Questionnaires offer the following advantages:
- Less personal than interviewing, their anonymity can encourage more honest answers.
- Works well to reach respondents who are widely scattered, or live considerable distances away.
- Provides information from those unlikely to attend meetings and workshops.
- Permits expansion of the mail list.
- Can be used for statistical validation.
- Allows results to be extrapolated by subgroups.
- Allows the respondent to fill out at a convenient time.
- More economical and less labour intensive than interviews and telephone surveys as they provide larger samples for lower total costs.
