→ ==**May ask sensitive Qs**== which upset people
→ ==**Need to be brief**==; limits amt of info that can be gathered, ppl wont answer if its too time-consuming
→ ==**Respondent issues**==; have they received it? has the named respondent actually completed it?
→ ==**Low response rates**==; esp with postal questionnaires
→ ==**Unrepresentative**==; low RR distorts representativeness
* busy people may fail to respond e.g. w/c
* can increase by offering incentives/sending follow ups, but **adds to cost/time**
→ ==**inflexible**==; after finalising, cant explore new areas of interest
→ ==**lacks validity**==; no contact between subject + researcher, cant know of respondent interprets questions/answers the same way
* ‘occasionally’ may mean diff things to diff people
→ ==**people can lie**==; e.g. not knowing, giving answers to please/annoy researcher. affects validity
→ ==**imposing researcher’s meanings**==; via choosing questions + response categories, limiting answers, etc.