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5. Long questionnaires result in
lower response rates.
Effects of Questionnaire length on Participation and Indicators of Response Quality in a
web survey (Galesic, Bosnjak 2009)
6. Long questionnaires lead to
reduced response quality and
increased straightliners.
Effects of Questionnaire Length on Response Quality
(Herzog, Bachman 1981)
7. Matrices/grid formats introduce
measurement error and are more
difficult for respondents.
Presentation of a Single Item versus a Grid: Effects on the Vitality and Mental Health
Scales of the SF-36v2 Health Survey (Callegaro, Shand-Lubbers, Dennis 2009)