Questionnaires offer researchers the opportunity to gather large amounts of data, due to the number of questions that can be asked. They can contain open and closed questions as well as just open or just closed questions. Questionnaires with closed questions collect quantitative data, which the researcher can measure during data analysis. This is because all participants have answered the same questions, selecting one of the options provided. Questionnaires with open and closed questions collect qualitative and quantitative data, because although participants are answering the same questions to give quantitative results, by asking "why?" after each question, the researcher has opened the questionnaire to explanations, hence having qualitative data to analyse as well.There are many advantages to using questionnaires as a research method. They are economical to produce, both in cost and time, allowing a large number can be sent out thus increasing the possibility of getting a range of responses back. Participants also have anonymity, as their name does not appear on the questionnaire which means Kumar (2010: 148) refers to the benefit of this and states "As there is no face-to-face interaction between respondents and interviewer, this method provides greater anonymity. In some situations where sensitive questions are asked it helps to increase the likelihood of obtaining accurate information.