There is no one-size-fits-all answer to this question, as the best practices for conducting UX research interviews will vary depending on the specific goals and objectives of the research project. However, there are some general tips and guidelines that can be useful for all interviewers to keep in mind.

First and foremost, it is important to clearly define the goals and objectives of the research project before starting to conduct interviews. This will help to ensure that the questions asked during the interviews are relevant and focused on the right topics. Additionally, interviewers should have a good understanding of the target audience for the research project, as this will help to inform the questions that are asked.

Once the goals and objectives of the research project have been defined, the next step is to develop a list of questions to ask during the interviews. The questions should be designed to elicit detailed and specific information from the interviewees. Additionally, the questions should be framed in a way that allows the interviewees to freely express their opinions and views.

When conducting the actual interviews, it is important to create a relaxed and comfortable environment for the interviewees. This will help to encourage them to open up and share their thoughts and views. Additionally, the interviewer should be careful to avoid leading or biasing the interviewees in any way.

Finally, after the interviews have been conducted, it is important to take the time to analyze the data that was collected. This data should be used to inform the design of the final product or solution. Additionally, the data collected from the interviews can be used to improve the process for future research projects.