Self-completion is one of a rarely used methods that sometimes serves as the most efficient way of polling. In whole it comprises two ways of data collection:

1: questionnaires are collected immediately after completion (the questionnaire is self-administered at the presence of the interviewer).

2: questionnaires are collected some time later upon completion (as an option - completion of product consumption diaries, the study of consumer goods baskets).

Self-completion method has a lot of advantages vs. other types of paid surveys:

  • small cost of the self-completion method;
  • opportunity of extremely wide coverage of the surveyed respondents;
  • opportunity of recruitment of the target audience (participants of a single paid polling, e.g. Coca-Cola users);
  • no influence on the results of the survey on part of a person administering the interview;
  • more frankly answers from respondents; simple organization of that type of the survey;
  • opportunity to learn opinions of respondents from remote regions of the country.

Some disadvantages of the self-completion methods are: slow moving data collection process and problem with getting completed questionnaires from respondents.