When you start working on a new project, one of the first things you need to do is to answer the question, “Who are the people who will use this product?” If you don’t have a clear answer to this question, chances are you’ll end up with something completely unusable.
You cannot understand good design if you do not understand people; design is made for people.
User interviews are a tool that can help you get this understanding. When an interview is conducted properly, it can give you an in-depth knowledge of your users—their goals, perceptions, and experiences. Poor interviews, on the other hand, can give you inaccurate information that can take your design in the wrong direction.
You need to take into account a lot of different factors to conduct an interview properly. In this article, we’ll look at the foundational principles of strong user interviews.
When to conduct an interview
While user interviews can be helpful during any phase of the product development process, there are three particular times when interviews are especially valuable. These times are:
- At the beginning of a project, before a clear concept has been defined. You interview people to get a better understanding of your potential users and their wants and needs. The information you collect during the interview will help you start thinking of a solution.
- During the early stages of product development. When a product team has an early model of their concept, showing it to users can provide valuable feedback.
- After the product has shipped. Interviews can be conducted in combination with observation. Such interviews are called contextual inquiries, and are conducted in the context of using a product. These give users an opportunity to show you how they interact with your product.
You might also like: How to Conduct Research That Drives A/B Testing.
How to conduct an interview
There are three steps in the interview process—preparation for the interview, conducting the interview, and analyzing results after the interview. Below, we look at how you should conduct each step of a successful, insightful interview.
Step 1: Before the interview
Some people believe that conducting an interview is just like having a conversation with other people, and that it doesn’t require a lot of preparation. But while interviews obviously share similarities with everyday conversations, a good interview requires significant preparation. Without a preparation, your chances of getting valuable insights are limited.
Below are the things you should have prepared before entering an interview.
1. Have a clear goal
It’s crucial to start each new interview project with a clear understanding of the purpose of your research. It’s vital that you know why you want to conduct the interviews and what you want to get out of them. For example, you might want to learn why 50 percent of users who reached the product checkout phase in your ecommerce app abandon the checkout flow.
The following questions will help you formulate a goal for your interviews.
- What do I need to know about our users to make our app better?
- How will that knowledge inform our design process?
Tip: Involve the key stakeholders in the process of defining a purpose for your research. You’ll add more weight to this activity by getting buy-in from them.
2. Make sure the interview is the right tool for the problem you want to solve
Interviews are not a universal answer to all design challenges. It’s vital to know when an interview will work best and when it’s better to use other tools. For example, an interview might not be the best tool for finding what color scheme should you choose for your app. It’s much better to use user testing for this purpose.
3. Decide who to recruit
Recruitment is a vital part of the interview process. It’s essential to recruit a representative sample of your target audience. Start with your user personas and try to find interview participants that match them. Decide whether you want to have only one particular group of users or users from many different groups.
When it comes to the number of people you should interview, there are no hard and fast rules. You can apply the principle established by Jakob Nielsen for usability testing, and start out by interviewing five participants. If you notice that by participant number five you’ve stopped getting any new insights, you probably don’t need to recruit any more participants.
4. Design your interview questions
If you want just once piece of advice for your interview, this is it—don’t start an interview without a prepared discussion guide. A discussion guide is a document in which you formulate the questions you want to ask your participants. Your discussion guide should be closely tied to the purpose of your research, and the questions should be selected according to your learning goal.
At the same time, having a discussion guide doesn’t mean that you need to ask all of the questions mentioned in it during the interview. Think of it more like a reference document, a ‘skeleton’ for your discussion, rather than a script. During the interviews, the guide should serve as a reminder of the questions you want to ask or topics you want to cover.
Discussion guides typically consist of two types of questions—general and product-specific. General questions are questions you ask during the introduction part. These might include:
- Could you tell me about your habits?
- What apps/websites do you use on a regular basis?
Product-specific questions are focused on getting specific details about user behavior. These questions might include:
- What’s the hardest part of [the task]?
- What can we do to make [the task] easier?
Keep the following tips in mind when preparing a question script:
- Keep the script reasonably short. Write down all your questions and read them out loud. If it takes more than ten minutes to read through them, your script is too long, and you need to optimize it.
- Write clear questions. Don’t use terms in your questions that might be unfamiliar to the user.
- Avoid long questions. The questions you ask should be relatively brief and easy to understand. People can’t retain a lot of information in their short-term memory, so avoid long sentences with a lot of details.
- Don’t ask questions about the future. When you ask questions like, “When we release [product] on the market, will you purchase it?”, people are likely to say yes just to make you feel good. In reality, they simply don’t have any idea.
- Test your discussion guide. Conduct a trial run for your interview with one of your peers, and ask them the questions from your guide. This will help you understand whether or not you can get valuable insights based on the answers you get.
- Iterate your discussion guide. Refine the guide based on results of real interview sessions.
5. Create a good environment
When it comes to in-person interviews, the physical space you choose to use for the interview will have a direct impact on the results of your interview session. People often behave according to their environment. Just imagine an empty room with white walls, two chairs, a table, and a mirrored wall which shields the observers on the other side. Such a room looks more like a place for interrogations rather than a place for discussions. It will be hard for an interviewee to relax in such environment.
6. Don’t conduct the interview alone
It’s best to conduct an interview with a partner. There are three significant benefits of having two people facilitating the interview together:
- You can distribute responsibilities. One person asks questions while the other takes notes.
- You’ll know that everything will go according to the plan. The person who takes notes can also think about any questions that the first person forgot to ask, and remind her about it.
- You’ll gain more valuable insights. When two people conduct an interview together, they’ll have an opportunity to share each other’s thoughts and impressions after the interview.
Step 2: During the interview
Once you’ve prepared, the next step is to ensure that the actual interview goes according to plan. Below are some steps to take to ensure that you get valuable insights from your interview.
1. Put yourself in the mood
Before you step into the meeting room, take a deep breath and smile. It’s a proven fact that smiling creates a more positive attitude, and since positive attitudes are contagious, your interviewee will likely feel better, too.
2. Stick to the semi-structured interview format
When it comes to selecting a format for interviewing people, there are two extremes:
- Completely structured interviews—an interview where all questions are prescripted. Such interviews look very much like a survey.
- Completely unstructured interviews—an open dialog between people, and which rarely brings valuable insights. As Steve Portigal, author of the book Interviewing Users says,“To learn something new requires interviewing, not just chatting.”
Semi-structured interviews lie between the two extremes. They’re a type of interview where you prepare a set of topics you want to cover (recorded in your discussion guide), but where you can change the order of questions depending on how the conversation evolves.
The semi-structured interview approach has two significant advantages:
- It feels natural to people. Unlike a scripted interview, the semi-structured interview doesn’t create the feeling of a police interview.
- It gives the interviewer an opportunity to explore topics that they had not previously thought relevant. It’s possible to get a lot of valuable insights by elaborating on answers and asking follow-up questions.
3. Build rapport with interviewee
The quality of the interview will suffer if you aren’t able to put the interviewee at ease and earn their confidence. That’s why your goal at the beginning of an interview is to make the interviewee feel comfortable. It’s not that hard to achieve this goal. Here is what you need to do:
- Always provide a nice welcome for your interviewee: greet them by name, offer a drink, and initiate friendly small talk before moving to the main topic of discussion.
- Learn a little bit about the interviewee. Ask questions like, “Can you tell me about yourself,” and let them freely talk about their background, lifestyle, or technology habits. Such questions are both ice-breakers and a great way to get some context about your interviewees. The information you get might be helpful for the future analysis.
- Use non-verbal cues to make them feel comfortable—maintain eye contact and watch your body language. Avoid fidgeting or crossing your arms.
- Explain the purpose of the interview. Describe what you are trying to achieve and explain how you plan to use the results. The point of this is to give the interviewee some idea of what’s going on, and what sort of questions they might be asked so that they don’t feel confused during the interview.
- Make sure the interviewee doesn’t feel like they’re being tested in any way. If you plan to test a prototype of a product during the interview, make it clear to the interviewee that you're testing the prototype, not them.
4. Resist the urge to judge or educate your interviewee
The foundation for conducting a good interview is to keep an open mind and be truly curious about the participant’s perspective. Your interviewees are there to teach you something, not the other way around! It’s counterproductive to judge your interviewee or try to educate them during the interview. You have a limited amount of time for the session (usually, no more than one hour) and your goal is to use it effectively. Elicit as much information as you can during this time.
5. Ask permission for video recording
While the most common form of data collection during interviews is note taking, video recording can also be an excellent way to collect information. Of course, any time you want to record your participants you need to ensure that they are okay with that. Always ask for permission before starting the recording, and be ready to abandon it if your interviewee feel uncomfortable.
6. Start off with the easy questions
Start each interview session with simple questions. These might be three to five lightweight questions from the general section of your discussion guide that you ask before moving to the main topics you want to cover. Such questions are intended to act as a warm-up for the interviewee, and make it easier for the interviewer to create a connection. But make sure that the questions are relevant to the broader theme of the session.
7. Prioritize open-ended questions
Close-ended questions are questions that can be answered with “yes” or “no.” It’s hard to imagine any great discussion that only consists of close-ended questions. You’ll have a better chance of getting valuable insights by asking open-ended questions. Such questions start with who, what, when, where, why, and how.
8. Ask follow-up questions
Don’t settle for the first answer you get. Always try to dig deeper to understand the interviewee’s point of view. Try to ask follow-up questions when users describe a particular case or problem.
Tip: Use the ‘Five Whys’ technique. This technique is called ‘Five Whys’ because you literally ask “why” five times to understand the interviewee’s intention or point of view. For example, imagine you ask a question like, “Why do you like this ecommerce app?”. Your interviewee may respond, “Because it offers the products I need.”
You can stop here and mention product range as a primary reason of using a product, but you won’t have the whole story. In fact, without asking “why” again, your ideas about the interviewee’s motivation might be completely incorrect. Maybe a user likes a specific type of product that she can find only in this particular app, or perhaps she loves the price on products. The only way to know the right answer is by asking another “why?”
9. Use the critical incident method
It’s well-known fact that people are really bad at recalling situations that happened in the past. Human memory is fallible, and people are notorious for adding details to make the story more compelling. But when you need to collect accurate information about user experience, the critical incident method can help.
The critical incident method is to ask users to recall a specific situation from the past in which they faced a terrible or really excellent experience. Unlike general situations from the past that the user might easily forget, the extreme cases are often more vivid in users' minds, meaning they can remember some specifics that will be valuable for you. This is why the critical incident method is especially great for exploratory interviews.
10. Avoid leading questions
Leading questions are questions that frame the interviewee’s mind around a particular answer. It’s essential to avoid or at least minimize the number of leading questions you ask, otherwise the results of your interview sessions will be too biased and you’ll hear only what you want to hear.
“How often do you watch Netflix?” is an example of leading question. By asking such question, you assume as fact that your interviewee is an active Netflix user. It’s much better to ask questions in a neutral manner.
So, if you want to know about user preferences regarding video streaming services, you can start with asking a question like, “Do you have any experience with any video streaming services?”
11. Clarify things
When you’re not quite sure exactly what an interviewee is talking about, ask her for a clarification. Don’t leave questions to the end of the interview session, because it’ll be hard to recreate the original context. Don’t be afraid to ask interviewees to elaborate on their responses.
12. Minimize note-taking
Written notes are one of the common artifacts we get from an interview session, and they are extremely valuable in analyzing the results of an interview. So it might sound strange to suggest minimizing your note taking. But there’s a good reason for it—it’s almost impossible to pay full attention to your interviewee and take notes at the same time.
If you ask questions and take notes at the same time, there’s a good chance that you’ll have a hard time managing the interview. Also, when you focus too much on note taking, such behavior creates a strong sense of a police interview, not a regular conversation. Try to note only the most important information or questions you want to ask for the further analysis.
13. Don’t be afraid of silence
When you conduct an interview, try not to fear silent pauses in the conversation. It’s natural for people to fill the silence with words, but don’t fall into the trap of trying to fill the pauses yourself. Instead, give the interviewee the opportunity to provide additional information.
14. Finish with a wrap-up summary
At the end of the interview, you should give your respondent a sense of closure. Don’t just stop the conversation abruptly when you reach the last question in your interview guide. Instead, give an interviewee an opportunity to ask questions. After that, thank your interviewees for taking their time.
You might also like: How to Choose the Right A/B Testing Strategy for Your Clients.
Step 3: After the interview
Once you’ve completed your interview, it’s time to analyze your responses. This is when the insights from your interviewees will become especially clear. Below are the steps you need to take.
1. Conduct a retrospective
Ideally, after each interview you perform, try to reflect on how well you managed it and what you can do to improve the quality of your interviews in the future.
2. Structure the information
The next step is to analyze what people have told you. You’ll probably have a massive amount of data—dozens of notes, video recordings, and personal impressions. Most of this data will be qualitative rather than quantitative. As a result, it might feel overwhelming.
Hopefully, two common tools can help you structure the data:
- A report with specific sections. The goals you stated at the beginning of your interview project and the discussion guide you prepared can be a good foundations for your reports—they will help you filter through the key data.
- Mind maps can help you structure the data in an understandable format.
3. Combine interviews with other techniques
After analyzing the interview results, you might feel like you have a pretty good understanding of what you need to do with your product, and it might be tempting to start implementing your insights right away. But it’s better to resist this temptation, because it’s essential to first validate the results you got.
The great thing about interviews is that they can be combined with other user research methods, such as usability testing or user surveys. By combining interviews with other techniques, you’ll validate not only your hypothesis but also gain more profound insights into objective results.
Do user interviews right
User interviews can be a very informative and helpful way to see what the world looks like from your users’ perspective. But that only happens when interviews are conducted properly.
If you just recently started to conduct user interviews, you probably won’t get everything right the first time. But don’t worry! The great thing about interviewing is that it's a skill, and similar to any other skill it can be learned. All you need to do is to practice hard and analyze your results.
How have user interviews helped you build excellent products? Share your experience in the comments below!