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Several researchers have examined the effect of giving subjects a deadline for responding. While a deadline will usually reduce the time from the mailing until the returns begin arriving, it appears that it does not increase response, and may even reduce the response. One possible explanation is that a cutoff date might dissuade procrastinators from completing the questionnaire after the deadline has past.

The timeline for Internet surveys is much different from a mail survey. While mail surveys take weeks, Internet surveys take days. You will receive about 90% of the response within three days after the email invitation is sent.


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