Selecting type of survey is one of the most critical decisions in social research. What consideration you may use to select a survey method?
There are two broad categories that surveys can be divided into: the questionnaire and the interview. The questionnaires are usually the paper and pencil instruments that the respondent has to complete. Usually with the questionnaire survey method there is a mixture of categorical (nominal and ordinal) and quantitative (interval and ratio) questions. The interview method is direct contact with the respondent. Unlike with questionnaire surveys, the interviewer has the opportunity to probe or ask follow-up questions. The interviewer