This is a chance to showcase the depth of your knowledge in this field, so make sure to mention a variety of methods you’d use in different situations. Here’s an example:
“I usually determine my research methods directly after defining the overall goals and objectives. Different methods work better in different situations, so I tend to go through the entire list of methods available to me and consider what value each could provide.
Some of the most common methods I use are user interviews, surveys, usability testing, diary studies, contextual inquiry, and data analysis.”