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But it would be wrong unduly to strictly regulate the volume of the questionnaire, i.e. the number of questions and time for its completion. Although there are reasonable limits and boundaries of the volume forms, but in each case its volume is due primarily to substantive issues of the study and a number of subjective and objective factors. Firstly, the very significant role played by psychological factors. So, depending on how interested the Respondent's form can change its volume. The biggest ????6?? can easily be filled and subjectively take a little time if it is interesting. Conversely, a questionnaire may be small in size, but if it is poorly structured, irritating the Respondent, then the answer to it will be a real meal.You can check the profile (this should be done when pilot (trial) survey), asking respondents after filling, the time it took to answer the questions. If subjective time is below the average actual time required to fill, and if questionnaire respondents liked, we can assume that the issue with the volume of the questionnaire solved correctly. If subjective time is greater than the actual average, so it is necessary to alter it. The matter is whether the Respondent is passionate about the form offered to him by the absentee the conversation. This can be judged because otherwise uninteresting companion want to escape in ten minutes, and others can talk for hours. Therefore, it is necessary to remember about the psychological perception of the whole questionnaire in General and of each question separately.
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