1. The ten-yearly survey of the whole UK population in the form of a written questionnaire.
  2. A person who completes and returns a questionnaire or takes part in a survey.
  3. Because they need to be fairly brief (most respondents will not complete long ones), thus limiting the amount of information that can be gathered.
  4. Because those who respond may be different from those who don’t.
  5. Because once finalized, the researcher is stuck with the questions they have decided to ask and cannot explore any new areas of interest that may come up during the research.
  6. They are snapshots; they are too detached; it is not possible to clarify misunderstandings; respondents may lie, forget, not know; closed-ended questions restrict respondents’ ability to express their meanings.
  7. When two or more factors vary together (such as, one factor rises as the other factor rises or decreases).
  8. They give a picture of how things are at one moment in time.
  9. The recipient may not have received the questionnaire, or may not have filled in the questionnaire him/herself.
  10. Because they produce reliable (replicable)/ quantitative/ large-scale results.
  11. They are easily replicable by other researchers; they involve no interviewer bias; all respondents are given exactly the same questions.