Excessive length is never a problem with questionnaires.
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Q20: Multichotomous questions provide exactly two alternatives to
Q21: The benefit of a scale is that
Q22: Balanced scales have the same number of
Q23: The "don't know" or "no opinion" response
Q24: The researcher should avoid asking leading or
Q26: Mail questionnaires lend themselves more to branching
Q27: The introduction of the questionnaire tells the
Q28: A general rule is to place questions
Q29: A questionnaire should be pretested before it
Q30: The bottom line for an effective data-gathering
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