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finally, decreased the total number of respondents to the individual, especially complex conceptual questions, i.e. respondents again did not bother delving into the meaning not only difficult, but long-winded question, and often just left it unanswered. The weaker result reflected a number of dependencies that are quite clearly traced in few words the questionnaire. All this clearly shows the negative impact of length of questionnaire on study results.Of course, in relation to the questionnaire significantly affected the psychological perception of it if its content is interesting to the Respondent, other factors, including long-winded, played a lesser role. But it's better to stick to a certain optimal number of words in the questionnaire.How many of them can be?
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