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What is the best time duaration in distribuiting questionaire? 


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The optimal timing for distributing questionnaires in surveys can significantly impact response rates and cost efficiency. Incorporating a second self-administered questionnaire (SAQ) mailing, as suggested by Dillman's Tailored Design Method, can notably enhance response rates and cost-effectiveness in surveys involving minority populations. This approach, demonstrated in the REACH U.S. survey, involved sending the second SAQ mailing six weeks after the initial one, aligning with Dillman's recommendations. The timing of follow-up contacts, especially in multimode surveys, plays a crucial role in achieving maximum responses while containing costs. By strategically timing the distribution of questionnaires, researchers can optimize response rates and minimize expenses, ultimately enhancing the effectiveness of data collection efforts.

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The optimal timing for distributing questionnaires in a multimode survey is six weeks after the initial mailing, as shown in the study on follow-up questionnaire mailings.
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