Questionnaires are very cost effective when compared
to face-to-face interviews. This is especially true for
studies involving large sample sizes and large geographic
areas. Written questionnaires become even more cost
effective as the number of research questions increases.
Questionnaires are easy to analyze. Data entry and
tabulation for nearly all surveys can be easily done with
many computer software packages.
Questionnaires are familiar to most people. Nearly
everyone has had some experience completing
questionnaires and they generally do not make people
Questionnaires reduce bias. There is uniform question
presentation and no middle-man bias. The researcher's own
opinions will not influence the respondent to answer
questions in a certain manner. There are no verbal or
visual clues to influence the respondent.
Questionnaires are less intrusive than telephone or
face-to-face surveys. When a respondent receives a
questionnaire in the mail, he is free to complete the
questionnaire on his own time-table. Unlike other
research methods, the respondent is not interrupted by
the research instrument.