structured interview questions qualitative research

Structured vs. unstructured interviews: A complete guide

Last updated

7 March 2023

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Miroslav Damyanov

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Interviews can help you understand the context of a subject, eyewitness accounts of an event, people's perceptions of a product, and more.

In some instances, semi-structured or unstructured interviews can be more helpful; in others, structured interviews are the right choice to obtain the information you seek.

In some cases, structured interviews can save time, making your research more efficient. Let’s dive into everything you need to know about structured interviews.

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• What are structured interviews?

Structured interviews are also known as standardized interviews, patterned interviews, or planned interviews. They’re a research instrument that uses a standard sequence of questions to collect information about the research subject. 

Often, you’ll use structured interviews when you need data that’s easy to categorize and quantify for a statistical analysis of responses.

Structured interviews are incredibly effective at helping researchers identify patterns and trends in response data. They’re great at minimizing the time and resources necessary for data collection and analysis.

What types of questions suit structured interviews?

Often, researchers use structured interviews for quantitative research . In these cases, they usually employ close-ended questions. 

Close-ended questions have a fixed set of responses from which the interviewer can choose. Because of the limited response selection set, response data from close-ended questions is easy to aggregate and analyze.

Researchers often employ multiple-choice or dichotomous close-ended questions in interviews. 

For multiple-choice questions, interviewees may choose between three or more possible answers. The interviewer will often restrict the response to four or five possible options. An interviewee will likely need help recalling more, which can slow down and complicate the interview process. 

For dichotomous questions, the interviewee may choose between two possible options. Yes or no and true or false questions are examples of dichotomous questions.

Open-ended questions are common in structured interviews. However, researchers use them when conducting qualitative research and looking for in-depth information about the interviewee's perceptions or experiences. 

These questions take longer for the interviewee to answer, and the answers take longer for the researcher to analyze. There's also a higher possibility of the researcher collecting irrelevant data. However, open-ended questions are more effective than close-ended questions in gathering in-depth information.

Sometimes, researchers use structured interviews in qualitative research. In this case, the research instrument contains open-ended questions in the same sequence. This usage is less common because it can be hard to compare feedback, especially with large sample sizes.

• What types of structured interviews are there?

Researchers conduct structured interviews face-to-face, via telephone or videoconference, or through a survey instrument. 

Face-to-face interviews help researchers collect data and gather more detailed information. They can collect and analyze facial expressions, body language, tone, and inflection easier than they might through other interview methods . 

However, face-to-face interviews are the most resource-intensive to arrange. You'll likely need to assume travel and other related logistical costs for a face-to-face interview. 

These interviews also take more time and are more vulnerable to bias than some other formats. For these reasons, face-to-face interviews are best with a small sample size.

You can conduct interviews via an audio or video call. They are less resource-intensive than face-to-face interviews and can use a larger sample size. 

However, it can be difficult for the interviewer to engage effectively with the interviewee within this format, which can inject bias or ambiguity into the responses. This is particularly true for audio calls, especially if the interviewer and interviewee have not met before the interview. 

A video call can help the interviewer capture some data from body language and facial expressions, but less so than in a face-to-face interview. Technical issues are another thing to consider. If you’re studying a group of people that live in an area with limited Internet connectivity, this can make a video call challenging.

Survey questionnaires mirror the essential elements of structured interviews by containing a consistent sequence of standard questions. Surveys in quantitative research usually include close-ended questions. This data collection method can be beneficial if you need feedback from a large sample size.

Surveys are resource-efficient from a data administration standpoint but are more limited in the data they can gather. Further, if a survey question is ambiguous, you can’t clear up the ambiguity before someone responds. 

By contrast, in a face-to-face or tele-interview, an interviewee may ask clarifying questions or exhibit confusion when asked an unclear question, allowing the interviewer to clarify.

• What are some common examples of structured interviews?

Structured interviews are relevant in many fields. You can find structured interviews in human resources, marketing, political science, psychology, and more. 

Academic and applied researchers commonly use them to verify insights from analyzing academic literature or responses from other interview types.

However, one of the most common structured interview applications lies outside the research realm: Human resource professionals and hiring managers commonly use these interviews to hire employees.

A hiring manager can easily compare responses and whittle down the applicant pool by posing a standard set of closed-ended interview questions to multiple applicants. 

Further, standard close-ended or open-ended questions can reduce bias and add objectivity and credibility to the hiring process.

Structured interviews are common in political polling. Candidates and political parties may conduct structured interviews with relatively small voter groups to obtain feedback. They ask questions about issues, messaging, and voting intentions to craft policies and campaigns.

• What do you need to conduct a structured interview?

The tools you need to conduct a structured interview vary by format. But fundamentally, you will need: 

A participant

An interviewer

A pen and pad (or other note-taking tools)

A recording device

A consent form

A list of interview questions

While some interviewees may express qualms about you recording the interview, it’s challenging to conduct quality interviews while taking detailed notes. Even if you have a note-taker in the room, note-taking may introduce bias and can’t capture body language or facial expressions. 

Depending on the nature of your study, others may wish to review your sources. If they call your conclusions into question, audio recordings are additional evidence in your favor.

To record, you should ask the interviewee to sign a consent form. Check with your employer's legal counsel or institutional review board at your academic institution for guidance about obtaining consent legally in your state. 

If you're conducting a face-to-face interview, a camcorder, digital camera, or even some smartphones are sufficient for recording.

For a tele-interview, you'll find that today's leading video conferencing software applications feature a convenient recording function for data collection.

If a survey is your method of choice, you'll need the survey and a distribution and collection method. Online survey software applications allow you to create surveys by inputting the questions and distributing your survey via text or email. 

In some cases, survey companies even offer packages in which they will call those who do not respond via email or text and conduct the survey over the phone.

• How to conduct a structured interview

If you're planning a face-to-face interview, you'll need to take a few steps to do it efficiently. 

First, prepare your questions and double-check that the structured interview format is best for your study. Make sure that they are neutral, unbiased, and close-ended. Ask a friend or colleague to test your questions pre-interview to ensure they are clear and straightforward.

Choose the setting for your interviews. Ideally, you'll select a location that is easy to get to. If you live in a city, consider addresses accessible via public transportation. 

The room where your interview takes place should be comfortable, without distraction, and quiet, so your recording device clearly captures your interviewee's audio.

If you're looking to interview people with specific characteristics, you'll need to recruit them. Some companies specialize in interview recruitment. You provide the attributes you need, and they identify a pool of candidates for a fee. Alternatively, you can advertise to participants on social media and other relevant avenues. 

If you're looking for college students in a specific region, look at student newspaper ads or affiliated social media pages. 

You'll also want to incentivize participation, as recruiting interview respondents without compensation is exceedingly difficult. It’s best to include a line or two about requiring written consent for participation and how you’ll use the interview audio.

When you have an interview participant, discuss the intent of your research and acquire their consent. Ensure your recording tools are working well, and begin your interview. 

Don't rely on the recordings alone: Note the most significant insights from your participant, as you could easily forget them when it's time to analyze your data.

You'll want to transcribe your audio at the data analysis stage. Some recording applications use AI to generate transcripts. Remove filler words and other sounds to generate a clear transcript for the best results. 

A written transcript will help you analyze data and pull quotes from your audio to include in your final research paper.

• What are other common types of interviews?

Typically, you'll find researchers using at least one of these other common interview types:

Semi-structured interviews

As the name suggests, semi-structured interviews include some elements of a structured interview. You’ll include preplanned questions, but you can deviate from those questions to explore the interviewee's answers in greater depth.

Typically, a researcher will conduct a semi-structured interview with preplanned questions and an interview guide. The guide will include topics and potential questions to ask. Sometimes, the guide may also include areas or questions to avoid asking.

Unstructured interviews

In an unstructured interview , the researchers approach the interview subjects without predetermined questions. Researchers often use this qualitative instrument to probe into personal experiences and testimony, typically toward the beginning of a research study. 

Often, you’ll validate the insights you gather during unstructured and semi-structured interviews with structured interviews, surveys, and similar quantitative research tools.

Focus group interviews

Focus group interviews differ from the other three types of interviews as you pose the questions to a small group. Focus groups are typically either structured or semi-structured. When researchers employ structured interview questions, they are typically confident in the areas they wish to explore. 

Semi-structured interviews are perfect for a researcher seeking to explore broad issues. However, you must be careful that unplanned questions are unambiguous and neutral. Otherwise, you could wind up with biased results.

What is a structured vs. an unstructured interview?

A structured interview consists of standard preplanned questions for data collection. These questions may be close-ended, open-ended, or a combination. 

By contrast, an unstructured interview includes unplanned questions. In these interviews, you’ll usually equip facilitators with an interview guide. This includes guidelines for asking questions and samples that can help them ask relevant questions.

What are the advantages of a structured interview?

Relative to other interview formats, a structured interview is usually more time-efficient. With a preplanned set of questions, your interview is less likely to go into tangents, especially if you use close-ended questions. 

The more structure you provide to the interview, the more likely you are to generate responses that are easy to analyze. By contrast, an unstructured interview may involve a freewheeling conversation with off-topic and irrelevant feedback that lasts a long time.

What is an example of a structured question?

A structured question is any question you ask in an interview that you’ve preplanned and standardized.

For example, if you conduct five interviews and the first question you ask each one is, "Do you believe the world is round, yes or no?" you have asked them a structured question. This is also a close-ended dichotomous question.

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• Types of Interviews in Research | Guide & Examples

Types of Interviews in Research | Guide & Examples

Published on March 10, 2022 by Tegan George . Revised on June 22, 2023.

An interview is a qualitative research method that relies on asking questions in order to collect data . Interviews involve two or more people, one of whom is the interviewer asking the questions.

There are several types of interviews, often differentiated by their level of structure.

• Structured interviews have predetermined questions asked in a predetermined order.
• Unstructured interviews are more free-flowing.
• Semi-structured interviews fall in between.

Interviews are commonly used in market research, social science, and ethnographic research .

Table of contents

What is a structured interview, what is a semi-structured interview, what is an unstructured interview, what is a focus group, examples of interview questions, advantages and disadvantages of interviews, other interesting articles, frequently asked questions about types of interviews.

Structured interviews have predetermined questions in a set order. They are often closed-ended, featuring dichotomous (yes/no) or multiple-choice questions. While open-ended structured interviews exist, they are much less common. The types of questions asked make structured interviews a predominantly quantitative tool.

Asking set questions in a set order can help you see patterns among responses, and it allows you to easily compare responses between participants while keeping other factors constant. This can mitigate   research biases and lead to higher reliability and validity. However, structured interviews can be overly formal, as well as limited in scope and flexibility.

• You feel very comfortable with your topic. This will help you formulate your questions most effectively.
• You have limited time or resources. Structured interviews are a bit more straightforward to analyze because of their closed-ended nature, and can be a doable undertaking for an individual.
• Your research question depends on holding environmental conditions between participants constant.

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Semi-structured interviews are a blend of structured and unstructured interviews. While the interviewer has a general plan for what they want to ask, the questions do not have to follow a particular phrasing or order.

Semi-structured interviews are often open-ended, allowing for flexibility, but follow a predetermined thematic framework, giving a sense of order. For this reason, they are often considered “the best of both worlds.”

However, if the questions differ substantially between participants, it can be challenging to look for patterns, lessening the generalizability and validity of your results.

• You have prior interview experience. It’s easier than you think to accidentally ask a leading question when coming up with questions on the fly. Overall, spontaneous questions are much more difficult than they may seem.
• Your research question is exploratory in nature. The answers you receive can help guide your future research.

An unstructured interview is the most flexible type of interview. The questions and the order in which they are asked are not set. Instead, the interview can proceed more spontaneously, based on the participant’s previous answers.

Unstructured interviews are by definition open-ended. This flexibility can help you gather detailed information on your topic, while still allowing you to observe patterns between participants.

However, so much flexibility means that they can be very challenging to conduct properly. You must be very careful not to ask leading questions, as biased responses can lead to lower reliability or even invalidate your research.

• You have a solid background in your research topic and have conducted interviews before.
• Your research question is exploratory in nature, and you are seeking descriptive data that will deepen and contextualize your initial hypotheses.
• Your research necessitates forming a deeper connection with your participants, encouraging them to feel comfortable revealing their true opinions and emotions.

A focus group brings together a group of participants to answer questions on a topic of interest in a moderated setting. Focus groups are qualitative in nature and often study the group’s dynamic and body language in addition to their answers. Responses can guide future research on consumer products and services, human behavior, or controversial topics.

Focus groups can provide more nuanced and unfiltered feedback than individual interviews and are easier to organize than experiments or large surveys . However, their small size leads to low external validity and the temptation as a researcher to “cherry-pick” responses that fit your hypotheses.

• Your research focuses on the dynamics of group discussion or real-time responses to your topic.
• Your questions are complex and rooted in feelings, opinions, and perceptions that cannot be answered with a “yes” or “no.”
• Your topic is exploratory in nature, and you are seeking information that will help you uncover new questions or future research ideas.

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Depending on the type of interview you are conducting, your questions will differ in style, phrasing, and intention. Structured interview questions are set and precise, while the other types of interviews allow for more open-endedness and flexibility.

Here are some examples.

• Semi-structured
• Unstructured
• Focus group
• Do you like dogs? Yes/No
• Do you associate dogs with feeling: happy; somewhat happy; neutral; somewhat unhappy; unhappy
• If yes, name one attribute of dogs that you like.
• If no, name one attribute of dogs that you don’t like.
• What feelings do dogs bring out in you?
• When you think more deeply about this, what experiences would you say your feelings are rooted in?

Interviews are a great research tool. They allow you to gather rich information and draw more detailed conclusions than other research methods, taking into consideration nonverbal cues, off-the-cuff reactions, and emotional responses.

However, they can also be time-consuming and deceptively challenging to conduct properly. Smaller sample sizes can cause their validity and reliability to suffer, and there is an inherent risk of interviewer effect arising from accidentally leading questions.

Here are some advantages and disadvantages of each type of interview that can help you decide if you’d like to utilize this research method.

Advantages and disadvantages of interviews

Type of interview	Advantages	Disadvantages
Structured interview
Semi-structured interview		, , , and
Unstructured interview		, , , and
Focus group		, , and , since there are multiple people present

If you want to know more about statistics , methodology , or research bias , make sure to check out some of our other articles with explanations and examples.

• Student’s  t -distribution
• Normal distribution
• Null and Alternative Hypotheses
• Chi square tests
• Confidence interval
• Quartiles & Quantiles
• Cluster sampling
• Stratified sampling
• Data cleansing
• Reproducibility vs Replicability
• Peer review
• Prospective cohort study

Research bias

• Implicit bias
• Cognitive bias
• Placebo effect
• Hawthorne effect
• Hindsight bias
• Affect heuristic
• Social desirability bias

The four most common types of interviews are:

• Structured interviews : The questions are predetermined in both topic and order. 
• Semi-structured interviews : A few questions are predetermined, but other questions aren’t planned.
• Unstructured interviews : None of the questions are predetermined.
• Focus group interviews : The questions are presented to a group instead of one individual.

The interviewer effect is a type of bias that emerges when a characteristic of an interviewer (race, age, gender identity, etc.) influences the responses given by the interviewee.

There is a risk of an interviewer effect in all types of interviews , but it can be mitigated by writing really high-quality interview questions.

Social desirability bias is the tendency for interview participants to give responses that will be viewed favorably by the interviewer or other participants. It occurs in all types of interviews and surveys , but is most common in semi-structured interviews , unstructured interviews , and focus groups .

Social desirability bias can be mitigated by ensuring participants feel at ease and comfortable sharing their views. Make sure to pay attention to your own body language and any physical or verbal cues, such as nodding or widening your eyes.

This type of bias can also occur in observations if the participants know they’re being observed. They might alter their behavior accordingly.

A focus group is a research method that brings together a small group of people to answer questions in a moderated setting. The group is chosen due to predefined demographic traits, and the questions are designed to shed light on a topic of interest. It is one of 4 types of interviews .

Quantitative research deals with numbers and statistics, while qualitative research deals with words and meanings.

Quantitative methods allow you to systematically measure variables and test hypotheses . Qualitative methods allow you to explore concepts and experiences in more detail.

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• Structured Interviews: Definition, Types + [Question Examples]

In carrying out a systematic investigation into specific subjects and contexts, researchers often make use of structured and semi-structured interviews. These are methods of data gathering that help you to collect first-hand information with regards to the research subject, using different methods and tools. 

Structured and semi-structured interviews are appropriate for different contexts and observations. As a researcher, it is important for you to understand the right contexts for these types of interviews and how to go about collecting information using structured or semi-structured interviewing methods. 

What is a Structured Interview?

A structured interview is a type of quantitative interview that makes use of a standardized sequence of questioning in order to gather relevant information about a research subject. This type of research is mostly used in statistical investigations and follows a premeditated sequence. 

In a structured interview, the researcher creates a set of interview questions in advance and these questions are asked in the same order so that responses can easily be placed in similar categories. A structured interview is also known as a patterned interview, planned interview or a standardized interview. 

What is a Semi-Structured Interview?

A semi-structured interview is a type of qualitative interview that has a set of premeditated questions yet, allows the interviewer to explore new developments in the cause of the interview. In some way, it represents the midpoint between structured and unstructured interviews. 

In a semi-structured interview, the interviewer is at liberty to deviate from the set interview questions and sequence as long as he or she remains with the overall scope of the interview. In addition, a semi-structured interview makes use of an interview guide which is an informal grouping of topics and questions that the interviewer can ask in different ways. 

Examples & Advantages of Semi-structured Interviews

An example of a semi-structured interview could go like this;

• Did you visit the doctor yesterday?
• Why did you have the visit?
• What was the outcome of the visit?

Each question is a prompt aimed at getting the respondent to give away more information

Advantages of a Semi-structured Interview

• They offer a more personalized approach that allows respondents to be a lot more open during the interview
• This interview-style combines both unstructured and structured interview styles so it merges the advantages of both.
• Allows two-way communication between candidates and interviewers

Types of Structured Interview

Structured interview examples can be classified into three, namely; the face-to-face interview, telephone interviews, and survey/questionnaires interviews

Face-to-Face Structured Interview

A face-to-face structured interview is a type of interview where the researcher and the interviewee exchange information physically. It is a method of data collection that requires the interviewer to collect information through direct communication with the respondent in line with the research context and already prepared questions. 

Face-to-face structured interviews allow the interviewer to collect factual information regarding the experiences and preferences of the research respondent. It helps the researcher minimize survey dropout rates and improve the quality of data collected, which results in more objective research outcomes. 

Learn: How to Conduct an Exit Survey

Advantages of Face-to-face Structured Interview

• It allows for more in-depth and detailed data collection.
• Body language and facial expressions observed during a face-to-face structured interview can inform data analysis.
• Visual materials can be used to support face-to-face structured interviews.
• A face-to-face structured interview allows you to gather more accurate information from the research subjects. 

Disadvantages of Face-to-face Structured Interview

• A face-to-face structured interview is expensive to conduct because it requires a lot of staff and personnel. Different costs are incurred during a face-to-face structured interview including logistics and remuneration. 
• This type of interview is limited to a small data sample size.
• A face-to-face structured interview is also time-consuming.
• It can be affected by bias and subjectivity . 

Tele-Interviews

A tele-interview is a type of structured interview that is conducted through a video or audio call. In this type of interview, the researcher gathers relevant information by communicating with the respondent via a video call or telephone conversation. 

Tele-interviews are usually conducted in accordance with the standardized interview sequence as is the norm with structured interviews. It makes use of close-ended questions in order to gather the most relevant information from the interviewee, and it is a method of quantitative observation. 

Advantages of Tele-interviews

• Tele-interviews are more convenient and result in higher survey response rates.
• It is not time-consuming as interviews can be completed relatively fast.
• It has a large data sample size as it can be used to gather information over a large geographical area.
• It is cost-effective.
• It helps the interviewee to target specific data samples.

Disadvantages of a Tele-interview

• It does not allow for qualitative observation of the research sample.
• It can lead to survey response bias.
• It is subject to network availability and other technical parameters.
• It is difficult for the interviewer to build rapport with an interviewee via this means; especially if they are meeting for the first time. 
• It may be difficult to read the interviewee’s body language, even with a video call. Body language usually serves as a means of gathering additional information about the research subjects. 

Use this: Interview Schedule Form

Surveys/Questionnaires  

A structured questionnaire is a common tool used in quantitative observation. It is made up of a set of standardized questions, usually close-ended arranged in a standardized interview sequence, and administered to a fixed data sample, in order to collect relevant information. 

In other words, a questionnaire is a method of data gathering that involves gathering information from target groups via a set of premeditated questions. You can administer a questionnaire physically or you can create and administer it online using data-gathering platforms like Formplus. 

Advantages of Survey/Questionnaire

• It is time-efficient and allows you to gather information from large data samples.
• Information collected via a questionnaire can easily be processed and placed in data categories.
• A questionnaire is a flexible and convenient method of data collection.
• It is also cost-efficient; especially when administered online.
• Surveys and questionnaires are useful in describing the numerical characteristics of large sets of data. 

Disadvantages of Surveys/Questionnaires  

• A high rate of survey response bias due to survey fatigue.
• High survey drop-out rate. 
• Surveys and questionnaires are susceptible to researcher error; especially when the researcher makes wrong assumptions about the data sample.
• Surveys and questionnaires are rigid in nature.
• In some cases, survey respondents are not entirely honest with their responses and this affects the accuracy of research outcomes. 

Tools used in Structured Interview 

• Audio Recorders

An audio recorder is a data-gathering tool that is used to collect information during an interview by recording the conversation between the interviewer and the interviewee. This data collection tool is typically used during face-to-face interviews in order to accurately capture questions and responses. 

The recorded information is then extracted and transcribed for data categorization and data analysis. There are different types of audio recording equipment including analog and digital audio recorders, however, digital audio recorders are the best tools for capturing interactions in structured interviews. 

• Digital Camera

A digital camera is another common tool used for structured tele-interviews. It is a type of camera that captures interactions in digital memory, which are pictures. 

In many cases, digital cameras are combined with other tools in a structured interview in order to accurately gather information about the research sample. It is an effective method of gathering visual information. 

Just as its name implies, a camcorder is the hybridization of a camera and a recorder. It is a portable dual-purpose tool used in structured interviews to collect static and live-motion visual data for later playback and analysis. 

A telephone is a communication device that is used to facilitate interaction between the researcher and interviewee; especially when both parties in different geographical spaces.

• Formplus Survey/Questionnaire

Formplus is a data-gathering platform that you can use to create and administer questionnaires for online survey s. In the form builder, you can add different fields to your form in order to collect a variety of information from respondents. 

Apart from allowing you to add different form fields to your questionnaires and surveys, Formplus also enables you to create smart forms with conditional logic and form lookup features. It also allows you to personalize your survey using different customization options in the form builder. 

Best Types of Questions For Structured Interview

Open-ended questions.

An open-ended question is a type of question that does not limit the respondent to a set of answers. In other words, open-ended questions are free-form questions that give the interviewee the freedom to express his or her knowledge, experiences and thoughts. 

Open-ended questions are typically used for qualitative observation where attention is paid to an in-depth description of the research subjects. These types of questions are designed to elicit full and detailed responses from the research subjects, unlike close-ended questions that require brief responses. 

Examples of Open-Ended Questions

• What do you think about the new packaging?
• How can we improve our services?
• Why did you choose this outfit?
• How can we serve you better? 

Advantages of Open-Ended Questions

• Open-ended questions are useful for qualitative observation.
• Open-ended questions help you gain unexpected insights and in-depth information. 
• It exposes the researcher to an infinite range of responses.
• It helps the researcher arrive at more objective research outcomes. 

Disadvantages of Open-ended Questions 

• Data collection using open-ended questions is time-consuming.
• It cannot be used for quantitative research.
• There is a great possibility of capturing large volumes of irrelevant data. 

Using Open-ended Questions for Interviews 

In interviews, open-ended questions are used to gain insight into the thoughts and experiences of the respondents. To do this, the interviewer generates a set of open-ended questions that can be asked in any sequence, and other open-ended questions may arise in follow-up inquiries.

Use this: Interview Feedback Form 

Close-Ended Questions

A close-ended question is a type of question that restricts the respondent to a range of probable responses as options. It is often used in quantitative research to gather statistical data from interviewees, and there are different types of close-ended questions including multiple choice and Likert scale questions . 

A close-ended question is primarily defined by the need to have a set of predefined responses which the interviewee chooses from. These types of questions help the researcher to categorize data in terms of numerical value and to restrict interview responses to the most valid data. 

Examples of Close-ended Questions

1. Do you enjoy using our product?

• I don’t Know

2. Have you ever visited London?

3. Did you enjoy the relationship seminar?

• No, I did not
• I can’t say

4. On a scale of 1-5, rate our service delivery. (1-Poor; 5-Excellent). 

5. How often do you visit home? 

• Somewhat often
• I don’t visit home. 

Advantages of Close-ended Questions 

• It is useful for statistical inquiries.
• Close-ended questions are straight-forward and easy to respond to.
• Data gathered through close-ended questions are easy to analyze.
• It reduces the chances of gathering irrelevant responses.

Disadvantages of Close-Ended Questions 

• Close-ended questions are highly subjective in nature and have a high probability of survey response bias .
• Close-ended questions do not allow you to collect in-depth information about the experiences of the research subjects.
• Close-ended questions cannot be used for qualitative observation. 

Using Close-ended Questions for Unstructured Interviews

Close-ended questions are used in interviews for statistical inquiries. In many cases, interviews begin with a set of close-ended questions which lead to further inquiries depending on the type, that is, structured, unstructured, or semi-structured interviews. 

Also Read: Structured vs Unstructured Interviews

Multiple Choice Question

A multiple-choice question is a type of close-ended question that provides respondents with a list of possible answers. The interviewee is required to choose one or more options in response to the question; depending on the question type and stipulated instructions. 

Typically, a multiple-choice question is one of the most common types of questions used in a survey or questionnaire. It is also a valid means of quantitative inquiry because it pays attention to the numerical value of data categories. A multiple-choice question is made up of 3 parts which are the stem, the correct answer(s) and the distractors.  

Examples of Multiple Choice Questions

• How many times do you visit home?

2. What types of shirts do you wear? (Choose as many that apply)

• Long-sleeved Shirt
• Short-sleeved Shirt 

3. Which of the following gadgets do you use?

4. What is your highest level of education?

Advantages of Multiple Choice Question

• A multiple-choice question is an effective method of assessment; especially n qualitative research. 
• It is time-efficient. 
• It reduces the chances of interviewer bias because of its objective approach. 

Disadvantages of Multiple Choice Questions

• Multiple Choice questions are limited to certain types of knowledge. 
• It cannot be used for problem-solving and high-order reasoning assessments. 
• It can lead to ambiguity and misinterpretation which causes survey response bias. 
• Survey fatigue leads to high survey drop-out rates. 

Dichotomous Questions

A dichotomous question is a type of close-ended question that can only have two possible answers. It is a method of quantitative observation and it is typically used for educational research and assessments, and other research processes that involve statistical evaluation. 

It is important for researchers to limit the use of dichotomous questions to situations where there are only 2 possible answers. These types of questions are restricted to yes/no, true/false or agree/disagree options and they are used to gather information related to the experiences of the research subjects. 

Examples of Dichotomous Questions

1. Do you enjoy using this product?

2. I have always used this product for my hair.

3. Are you lactose-intolerant?

4. Have you ever witnessed an explosion?

5. Have you ever visited our farm?

Advantages of Dichotomous Questions

• It is an effective method of quantitative research. 
• Surveys containing dichotomous questions are easy to administer.
• It is non-ambivalent in nature.
• It allows for ease of data-gathering and analysis.
• Dichotomous questions are brief, easy and simplified in nature. 

Disadvantages of Dichotomous Questions

• A dichotomous question is limited in nature.
• It cannot be used to gather qualitative information in research. 
• It is not suitable for in-depth data gathering. 

Learn: Types of Screening Interview 

How to Prepare a Structured Interview

• Choose the right setting

It’s important to provide a comfortable setting for your respondent. If you don’t, they’ll be subject to participant bias which can then skew the results of your interview.

• Tell them the purpose of your interview

You need to give your participants a heads up on why you’re conducting this. This is also the stage where you talk about any confidentiality clauses and get informed consent from your researchers. Explain how these answers will be used and who will have access to it. 

• Prepare your questions

Start by asking the basics to warm up your respondents. Then depending on your structured interview style, you can then choose tailored questions. E.g multiple-choice, dichotomous, open-ended, or close-ended questions. Ensure your questions are as neutral as possible and give room for your respondents to add any extra impressions or comments.

• Verify that your tools are working

Check that your audio recorder is working fine and that your camera is properly placed before you kick off the interview. For phone interviews, confirm that you have enough call credits or that your internet connection is stable. If you’re using Formplus, you don’t have to bother about getting cut off thanks to the offline form feature. This means you can still record responses even when your respondents have poor or zero internet connection

• Make notes and record observations

Ensure that your notes are legible and clear enough for you to revert. Write down your observations. Were your respondents nervous or surprised at any particular question?

Also Read: Unstructured Interviews

How to Use Formplus For Structured Interview

Sign into formplus.

In the Formplus builder, you can easily create a questionnaire for your structured interview by dragging and dropping preferred fields into your form. To access the Formplus builder, you will need to create an account on Formplus. 

Once you do this, sign in to your account and click on “Create Form ” to begin. 

Edit Form Title

Click on the field provided to input your form title, for example, “Structured Interview Questionnaire”.

• Click on the edit button to edit the form.
• Add Fields: Drag and drop preferred form fields into your form in the Formplus builder inputs column. There are several field input options for survey forms in the Formplus builder including table fields and you can create a smarter questionnaire by using the conditional logic feature. 
• Edit fields: You can modify your form fields to be hidden, required or read-only depending on your data sample and the purpose of the interview. 
• Click on “Save”
• Preview form. 

Customise Form

Formplus allows you to add unique features to your structured questionnaire. You can personalize your questionnaire using various customization options in the builder. Here, you can add background images, your organization’s logo, and other features. You can also change the display theme of your form. 

Share your Form Link with Respondents

Formplus allows you to share your questionnaire with interviewees using multiple form-sharing options. You can use the direct social media sharing buttons to share your form link to your organization’s social media pages. 

You can also embed your questionnaire into your website so that form respondents can easily fill it out when they visit your webpage. Formplus enables you to send out email invitations to interviewees and to also share your questionnaire as a QR code.

Conclusion  

It is important for every researcher to understand how to conduct structured and unstructured interviews. While a structured interview strictly follows an interview sequence comprising standardized questions, a semi-structured interview allows the researcher to digress from the sequence of inquiry, based on the information provided by the respondent. 

You can conduct a structured interview using an audio recorder, telephone or surveys. Formplus allows you to create and administer online surveys easily, and you can add different form fields to allow you to collect a variety of information using the form builder. 

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Structured Interviews: Guide to Standardized Questions

Introduction

Types of interviews in qualitative research, what are structured interviews good for, structured interview process.

Qualitative researchers are used to dealing with unstructured data in social settings that are often dynamic and unpredictable. That said, there are research methods that can provide some more control over this unpredictable data while collecting insightful data .

The structured interview is one such method. Researchers can conduct a structured interview when they want to standardize the research process to give all respondents the same questions and analyze differences between answers.

In this article, we'll look at structured interviews, when they are ideal for your research, and how to conduct them.

Interviews are intentionally crafted sources of data in social science research. There are three types of interviews in research that balance research rigor and rich data collection .

To better understand structured interviews, it's important to contrast them with the other types of interviews that also serve useful purposes in research. As always, the best tool for data collection depends on your research inquiry.

Structured interviews

The structured interview format is the most rigid of the three types of interviews conceptualized in qualitative research. Imagine policy makers want to understand the perceptions of dozens or even hundreds of individuals. In this case, it may make it easier to streamline the interview process by simply asking the same questions of all respondents.

The same structured interview questions are posed to each and every respondent, akin to how hiring managers ask the same questions to all applicants during the hiring process. The intention behind this approach is to ensure that the interview is the same no matter who the respondent is, leaving only the differences in responses to be analyzed .

Moreover, the standardized interview format typically involves respondents being asked the same set of questions in the same order. A uniform sequence of questions ensures for an easy analysis when you can line up answers across respondents.

Unstructured interviews

An unstructured interview is the exact opposite of a structured interview, as unstructured interviews have no predetermined set of questions. Instead of a standardized interview, a researcher may opt for a study that remains open to exploring any issues or topics that a participant brings up in their interview. While this can generate unexpected insights, it can also be time-consuming and may not always yield answers that are directly related to the original research question guiding the study.

However, this doesn't make a study that employs unstructured interviews less rigorous . In fact, unstructured interviews are a great tool for inductive inquiry . One typical use for unstructured interviews is to probe not only for answers but for the salient points of a topic to begin with.

When a researcher uses an unstructured interview, they usually have a topic in mind but not a predetermined set of data points to analyze at the outset. This format allows respondents to speak at length on their perspectives and offer the researcher insights that can later form a theoretical framework for future research that could benefit from a structured interview format.

Moreover, this format provides the researcher with the greatest degree of freedom in determining questions depending on how they interact with their respondents. A respondent's body language, for example, may signal discomfort with a particularly controversial question. The interviewer can thus decide to adjust or reword their questions to create a more comfortable environment for the respondent.

Semi-structured interviews

A semi-structured interview lies in the middle ground between the structured and unstructured interview. This type of interview still relies on predetermined questions as a structured interview does. However, unlike structured interviews, a semi-structured interview also allows for follow-up questions to respondents when their answers warrant further probing. The predetermined questions thus serve as a guide for the interviewer, but the wording and ordering of questions can be adjusted, and additional questions can be asked during the course of the interview.

A researcher may conduct semi-structured interviews when they need flexibility in asking questions but can still benefit from advance preparation of key questions. In this case, much of the advice in this article about structured interviews still applies in terms of ensuring some degree of standardization when conducting research.

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Consider that more free-flowing interview formats in qualitative research allow for the interviewer to more freely probe a respondent for deeper, more insightful answers on the topic of inquiry. This approach to research is useful when the researcher needs to develop theoretical coherence surrounding a new topic or research context in which it would be difficult to predict beforehand which questions are worth asking.

In this sense, structured interviews make more sense for research inquiries with a well-defined theoretical framework that guides the data collection and data analysis process . With such a framework in mind, researchers can devise questions that are grounded in existing research so that new insights further develop that scholarship.

Advantages of structured interviews

Formal, structured interviews are ideal for keeping interviewers and interview respondents focused on the topic at hand. A conversation might take unanticipated turns without a set goal or predetermined objective in mind; a structured interview helps keep the dialogue from going down any irrelevant tangents and minimize potentially unnecessary, extended monologues.

Another key advantage of structured interviews is that it makes comparisons across participants easier. Since each person was asked the same questions, the data is produced in a consistent format. Researchers can then focus on analyzing answers to a particular question, and there is minimal data organization work that needs to be done to facilitate the analysis.

There are also benefits in terms of the logistics of conducting structured interviews. Interviewers concerned with time constraints will find this format beneficial to their data collection .

Moreover, ensuring that respondents are asked the same questions in the same order limits the need for training interviewers to conduct interviews in a consistent manner. Unstructured and semi-structured interviews rely on the ability to ask follow-up questions in moments when the responses provide opportunities for deeper elaboration.

Those who conduct a structured interview, on the other hand, need only read from an interview guide with a list of questions to pose to respondents. This allows the researcher more freedom to rely on assistants to conduct interviews with minimal training and resources.

Disadvantages of structured interviews

In structured interviews, there is little room for asking probing questions of respondents, particularly if the researcher believes that follow-up questions might adversely influence how the respondent answers subsequent core questions. Restricting the interview to a predetermined set of questions may mitigate this effect, but it may also prevent a sufficiently clear understanding of respondents' perspectives established from the use of follow-up questions.

Forcing the interviewer to ask the same order of questions in an interview can also have a consequential effect on the data collection . Because every respondent is different, the interview questions may resonate with each person in different ways. A skillful interviewer conducting unstructured or semi-structured interviews has the freedom to make choices about what questions to ask in order to gather the most insightful data.

Ultimately, the biggest disadvantage of structured interviews comes from their biggest advantage: using predetermined questions can be a double-edged sword, providing consistency and systematic organization but also limiting the research to the questions that were decided before conducting the interviews. This makes it crucial that researchers have a clear understanding of which questions they want to ask and why. It can also be helpful to conduct pilot tests of the interview, to test out the structured questions with a handful of people and assess if any changes to the questions need to be made.

Why not just do surveys?

You might think that a structured interview is no different from a survey with open-ended questions. After all, the questions are determined ahead of time and won't change over the course of data collection . In many ways, there are many similarities in both methods.

There are, of course, benefits to either approach. Surveys permit data collection from much larger numbers of respondents than may be feasible for an interview study. Structured interviews, however, allow the interviewer some degree of flexibility, particularly when the respondent has trouble understanding the question or needs further prompting to provide a sufficient response.

Moreover, the interpersonal interaction between the interviewer and respondent offers potential for richer data collection because of the degree of rapport established through face-to-face communication. Where written questions may seem static and impersonal, an in-person interview (or at least one conducted in real time) might make the respondent more comfortable in answering questions.

Individual interviews are also more likely to generate detailed responses to questions in comparison to surveys. Interviews are also well suited for research topics that bear some personal significance for participants, providing ample space for them to express themselves.

When you conduct a structured interview, you are designing a study that is as standardized as possible to mitigate context effects and ensure the ease of data collection and analysis . As with all interviews conducted in qualitative research , there is an intentional process to planning for structured interviews with considerations that researchers should keep in mind.

Research design

As mentioned above, research inquiries with clearly defined theoretical frameworks tend to benefit from structured interviews. Researchers can create a list of questions from such frameworks so that answers speak directly to, affirm, or challenge the existing scholarship surrounding the topic of interest.

A researcher should conduct a literature review to determine the extent of theoretical coherence in the topic they are researching. Are there aspects of a topic or phenomenon that scholars have identified that can serve as key data points around which questions can be crafted? Conversely, is it a topic or phenomenon that lacks sufficient conceptualization?

If your literature review does not allow you to create or use a robust theoretical framework for data collection, consider other types of interviews that allow you to inductively generate that framework in data analysis .

You should also make decisions about the conditions under which you conduct interviews. Some studies go as far as making sure that the interview environment is a uniform context across respondents. Are interviews in a quiet, comfortable environment? What time of day are interviews conducted?

The degree to which you ensure uniform conditions across interviews is up to you. Whatever you decide, however, creating an environment where respondents feel free to volunteer answers will facilitate rich data collection that will make data analysis more meaningful.

Structured interview questions

An interview guide is an essential tool for structured interviews. This guide is little more than a list of required questions to ask, but this list ensures consistency across the interviews in your study.

When you write questions for a structured interview, rely on your literature review to identify salient points around which you can design questions. This approach ensures that you are grounding your data collection in the established research.

When crafting your guide, think about the time constraints and the likely length of answers that your respondents may give. Structured interviews can involve five or 25 questions, but if you are limited to 30-45 minutes per respondent, you will need to consider whether you can ask the required questions and collect sufficient responses within your timeframe.

As a result, it's important to pilot your questions with preliminary respondents or other researchers. A pilot interview allows you to test your interview protocol and make tweaks to your question guide before conducting your study in earnest.

Collecting data from structured interviews

Data collection refers to conducting the interviews , recording what you and your respondents say, and transcribing those recordings for data analysis . While this is a simple enough task, it is important to consider the equipment you use to collect data.

If the verbal utterances of your respondents are your sole concern, then an audio recorder should be sufficient for capturing your respondents' answers. Your choice of equipment can be as simple as a smartphone audio recorder application. Alternatively, you can consider professional equipment to make sure you collect as much audio detail as possible from your interviews.

Communication studies, for example, may be more concerned about the interviewer effect (e.g., studies that ask controversial questions to evoke particular responses) or the context effects (i.e., the effect of the surrounding environment on respondents) in interviews . In such cases, interviewers may capture data with video recordings to analyze body language or facial expressions to certain interview questions. Responses caught on video can be analyzed for any patterns across respondents.

Analyzing structured interviews

Once you have transcribed your interviews, you can analyze your data. One of the more common means for analyzing qualitative data is thematic analysis , which relies on the identification of commonly recurring themes throughout your research. What codes occur the most often? Are there commonalities across responses that are worth pointing out to your research audience?

It's a good idea to code each response by the question they address. The set order of questions in a structured interview study makes it easy to identify the answers given by each respondent. By coding each answer by the question they respond to and the themes apparent in the response, you will be able to analyze what themes and patterns occur in each set of answers.

You can also analyze differences between respondents. In ATLAS.ti, you can place interview transcripts into document groups to organize and divide your data along salient categories such as gender, age group, socioeconomic status, and other identifiers you may find useful. In doing so, you will be able to restrict your data analysis to a specific group of interview respondents to see how their answers differ from other groups.

Presenting interview findings

Disseminating qualitative research is often a matter of summarizing the salient points of your data analysis so that it is easy to understand, insightful, and useful to your research audience. For research collecting data from interviews , two of the more common approaches to presenting findings include visualizations and excerpts.

Visualizations are ideal for representing the salient ideas arising from large sets of otherwise unstructured data . Meaningful illustrations such as frequency charts, word clouds, and Sankey diagrams can prove more persuasive than an extended narrative in a research paper or presentation.

Consider the word cloud in the screenshot of ATLAS.ti below. This word cloud was generated from the transcripts of a set of interviews to illustrate what concepts appear the most often in the selected data. Concepts mentioned more often appear closer to the center of the cloud, showing which keywords appear most frequently in the data. Such a visualization can provide a quick illustration to show to your research audience what topics emerged in the data analysis.

You can also effectively represent each of your themes with an example or two from the responses in your data . Data exemplars are representations that the researcher deems are typical of or significant about the portion of the data under discussion. Often in research that employs interviews or observations , an author will present an exemplar to explain a theme that is significant to theory development or challenges an existing theory.

ATLAS.ti provides tools to restrict your view of the data to codes you find significant to your findings. The Code Manager view makes it easy to look not at the entire data set but the specific segments of text that have been coded with a particular code. In similar fashion, ATLAS.ti's Query Tool is ideal for defining a set of criteria based on the codes in the data to see which data segments are most relevant to your research inquiry.

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• Types of Interviews in Research | Guide & Examples

Types of Interviews in Research | Guide & Examples

Published on 4 May 2022 by Tegan George . Revised on 10 October 2022.

An interview is a qualitative research method that relies on asking questions in order to collect data . Interviews involve two or more people, one of whom is the interviewer asking the questions.

There are several types of interviews, often differentiated by their level of structure. Structured interviews have predetermined questions asked in a predetermined order. Unstructured interviews are more free-flowing, and semi-structured interviews fall in between.

Interviews are commonly used in market research, social science, and ethnographic research.

Table of contents

What is a structured interview, what is a semi-structured interview, what is an unstructured interview, what is a focus group, examples of interview questions, advantages and disadvantages of interviews, frequently asked questions about types of interviews.

Structured interviews have predetermined questions in a set order. They are often closed-ended, featuring dichotomous (yes/no) or multiple-choice questions. While open-ended structured interviews exist, they are much less common. The types of questions asked make structured interviews a predominantly quantitative tool.

Asking set questions in a set order can help you see patterns among responses, and it allows you to easily compare responses between participants while keeping other factors constant. This can mitigate biases and lead to higher reliability and validity. However, structured interviews can be overly formal, as well as limited in scope and flexibility.

• You feel very comfortable with your topic. This will help you formulate your questions most effectively.
• You have limited time or resources. Structured interviews are a bit more straightforward to analyse because of their closed-ended nature, and can be a doable undertaking for an individual.
• Your research question depends on holding environmental conditions between participants constant

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Semi-structured interviews are a blend of structured and unstructured interviews. While the interviewer has a general plan for what they want to ask, the questions do not have to follow a particular phrasing or order.

Semi-structured interviews are often open-ended, allowing for flexibility, but follow a predetermined thematic framework, giving a sense of order. For this reason, they are often considered ‘the best of both worlds’.

However, if the questions differ substantially between participants, it can be challenging to look for patterns, lessening the generalisability and validity of your results.

• You have prior interview experience. It’s easier than you think to accidentally ask a leading question when coming up with questions on the fly. Overall, spontaneous questions are much more difficult than they may seem.
• Your research question is exploratory in nature. The answers you receive can help guide your future research.

An unstructured interview is the most flexible type of interview. The questions and the order in which they are asked are not set. Instead, the interview can proceed more spontaneously, based on the participant’s previous answers.

Unstructured interviews are by definition open-ended. This flexibility can help you gather detailed information on your topic, while still allowing you to observe patterns between participants.

However, so much flexibility means that they can be very challenging to conduct properly. You must be very careful not to ask leading questions, as biased responses can lead to lower reliability or even invalidate your research.

• You have a solid background in your research topic and have conducted interviews before
• Your research question is exploratory in nature, and you are seeking descriptive data that will deepen and contextualise your initial hypotheses
• Your research necessitates forming a deeper connection with your participants, encouraging them to feel comfortable revealing their true opinions and emotions

A focus group brings together a group of participants to answer questions on a topic of interest in a moderated setting. Focus groups are qualitative in nature and often study the group’s dynamic and body language in addition to their answers. Responses can guide future research on consumer products and services, human behaviour, or controversial topics.

Focus groups can provide more nuanced and unfiltered feedback than individual interviews and are easier to organise than experiments or large surveys. However, their small size leads to low external validity and the temptation as a researcher to ‘cherry-pick’ responses that fit your hypotheses.

• Your research focuses on the dynamics of group discussion or real-time responses to your topic
• Your questions are complex and rooted in feelings, opinions, and perceptions that cannot be answered with a ‘yes’ or ‘no’
• Your topic is exploratory in nature, and you are seeking information that will help you uncover new questions or future research ideas

Depending on the type of interview you are conducting, your questions will differ in style, phrasing, and intention. Structured interview questions are set and precise, while the other types of interviews allow for more open-endedness and flexibility.

Here are some examples.

• Semi-structured
• Unstructured
• Focus group
• Do you like dogs? Yes/No
• Do you associate dogs with feeling: happy; somewhat happy; neutral; somewhat unhappy; unhappy
• If yes, name one attribute of dogs that you like.
• If no, name one attribute of dogs that you don’t like.
• What feelings do dogs bring out in you?
• When you think more deeply about this, what experiences would you say your feelings are rooted in?

Interviews are a great research tool. They allow you to gather rich information and draw more detailed conclusions than other research methods, taking into consideration nonverbal cues, off-the-cuff reactions, and emotional responses.

However, they can also be time-consuming and deceptively challenging to conduct properly. Smaller sample sizes can cause their validity and reliability to suffer, and there is an inherent risk of interviewer effect arising from accidentally leading questions.

Here are some advantages and disadvantages of each type of interview that can help you decide if you’d like to utilise this research method.

Advantages and disadvantages of interviews

Type of interview	Advantages	Disadvantages
Structured interview
Semi-structured interview
Unstructured interview
Focus group

The four most common types of interviews are:

• Structured interviews : The questions are predetermined in both topic and order.
• Semi-structured interviews : A few questions are predetermined, but other questions aren’t planned.
• Unstructured interviews : None of the questions are predetermined.
• Focus group interviews : The questions are presented to a group instead of one individual.

A structured interview is a data collection method that relies on asking questions in a set order to collect data on a topic. They are often quantitative in nature. Structured interviews are best used when:

• You already have a very clear understanding of your topic. Perhaps significant research has already been conducted, or you have done some prior research yourself, but you already possess a baseline for designing strong structured questions.
• You are constrained in terms of time or resources and need to analyse your data quickly and efficiently
• Your research question depends on strong parity between participants, with environmental conditions held constant

More flexible interview options include semi-structured interviews , unstructured interviews , and focus groups .

A semi-structured interview is a blend of structured and unstructured types of interviews. Semi-structured interviews are best used when:

• You have prior interview experience. Spontaneous questions are deceptively challenging, and it’s easy to accidentally ask a leading question or make a participant uncomfortable.
• Your research question is exploratory in nature. Participant answers can guide future research questions and help you develop a more robust knowledge base for future research.

An unstructured interview is the most flexible type of interview, but it is not always the best fit for your research topic.

Unstructured interviews are best used when:

• You are an experienced interviewer and have a very strong background in your research topic, since it is challenging to ask spontaneous, colloquial questions
• Your research question is exploratory in nature. While you may have developed hypotheses, you are open to discovering new or shifting viewpoints through the interview process.
• You are seeking descriptive data, and are ready to ask questions that will deepen and contextualise your initial thoughts and hypotheses
• Your research depends on forming connections with your participants and making them feel comfortable revealing deeper emotions, lived experiences, or thoughts

The interviewer effect is a type of bias that emerges when a characteristic of an interviewer (race, age, gender identity, etc.) influences the responses given by the interviewee.

There is a risk of an interviewer effect in all types of interviews , but it can be mitigated by writing really high-quality interview questions.

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