questionnaire

• questionnaires - list of a research or survey questions asked to respondents, and designed to extract specific information
• collect the appropriate data, make data comparable and amenable to analysis, minimize bias in formulating and asking question, to make questions engaging and varied - what is the purposes of questionnaires
• open ended - questions in which the respondent answers in his own words
• close ended - question in which respondent selects one or more options from pre-determined set of responses
• simple dichotomy - close ended question with only two response alternatives
• multiple choice - close ended questions with more than two response alternatives