- What is the most effective intervention for a particular problem?
- What causes X, or what are the effects of Y?
- What is the relationship between two phenomena such as unemployment and street crime; stressful living heart attack; breakdown in marital relationships and personal communication; and immigration and family roles?
- How do I measure the self-esteem of my clients?
- How do I ascertain the validity of my questionnaire?
- What is the pattern of programme adoption in the community?
- What is the best way of finding out community attitudes towards an issue?
- What is the best way to find out the effectiveness of a particular treatment?
- How can I select an unbiased sample?
- What is the best way to find out about the level of marriage satisfaction among my clients?