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Table 11 Field Dates

From: Teaching evolution in U.S. public schools: a continuing challenge

Main pencil/paper study

 February 15, 2019:

5015 pre-notification letters sent

 February 22, 2019:

5015 survey packets with consent and pre-incentive

 March 1, 2019:

5015 reminder postcards sent

 March 18, 2019:

4540 replacement packets sent

 March 25, 2019:

4132 reminder postcards sent

 May 24, 2019:

Mail survey data collection closed

Qualtrics follow-up

 Main follow-up file (emails provided by MDR)

  April 17, 2019:

3161 emails sent

  April 23, 2019:

2026 emails sent

  April 29, 2019:

2883 emails sent

   May 2, 2019:

Last recorded survey

  May 11, 2019:

Survey closed

 Supplemental follow-up file (emails identified in audit)

  April 23, 2019:

352 emails sent

  April 25, 2019:

335 emails sent

  May 1, 2019:

314 emails sent

  May 2, 2019:

Last recorded survey

  May 11, 2019:

Survey closed