Questionnaires Best used when: –There is a large sample –You want fairly straightforward information –You want standardised data from identical questions –You are more interested in what occurs rather than why or how They can be: –Relevant to study topic –Carefully worded –Informal, Conversational –Pretested, appropriate –Include known information for respondent –Appropriate length –Simple –Not leading Do you prefer being examined by a doctor of your own sex.