Usability

Individual interviews typically refer to talking with one user at a time face to face, by telephone, or with instant messaging or other computer-aided means. It is important to write an interview protocol that includes questions and probes to use for follow-up. Individual interviews resemble focus group because they involve talking with users. The main difference between an individual interview and a focus group is that researchers are talking to one person at a time. In an individual interview:

• You have more time to discuss topics in detail.
• You do not have to worry about the group dynamics that inevitably occurs in focus groups. 
• You can give the interviewee your full attention and adjust interviewing techniques.

The purpose of individual interviews can give users a deep understanding of the people who visit a website. Individual interviews are typically used to supplement online surveys.