How many respondents should be chosen?
You need only one person who would be specific, candid and totally accurate. However, since we often can’t identify this “special” one person we tend to use a sampling approach to asking for feedback. We need a critical mass of feedback to have confidence that how others perceive and experience us is how most people do-not just our strongest supporters or critics. Some limited research suggests that validity of feedback can be maximized by asking 8 to 12 raters, if possible, in each rater category you use (e.g., peers, team members, direct reports).
