3.4 Questionnaire Survey Surveys that mostly use questionnaires are among the most popular in social sciences (Young, 2016). Questionnaire is a set of standardized questions that follow a fixed scheme for the purpose of gathering individual data from respondents about one or more specific topics (Lavrakas, 2008). The main advantages of this method is that its implementation is cheap and it is not require as much effort from the researcher as other methods like verbal or telephone surveys. Questionnaire often have standardized answers (close-type questions) that make it simple to record the answer and thus their completion seems to be quick enough. However, such standardized answers may frustrate participants as the possible answers may not accurately represent their desired responses. That is the reason why the design of a questionnaire is a quite important procedure that youth workers have to pay attention. Standardized questions may be combined with open-ended questions that help each researcher to collect rich qualitative information (FAO, n.r.). Although there are no hard- and-fast rules about how to organize a questionnaire, however the key-points presented bellow may be borne in mind (FAO, n.r.): 47