Questionnaire+Special considerations-weaknesses

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  • Generally only useful for qualitative data.
  • Low response rates can bias the results. Can involve follow up telephone calls and letters to encourage returns.
  • Needs a return envelope/freepost address to encourage participation.
  • Depends on a high degree of literacy.
  • Wording of questions needs to be unambiguous to avoid bias, and should be pre-tested on a sample audience to ensure that you receive the information you desire.