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This report documents results of two phases of cognitive testing of new American Community Survey (ACS) envelopes and letters for use in 2010 to try to mitigate an expected decline in ACS response rates during the massive 2010 Census mobilization. We developed and tested prenotice and initial and replacement questionnaire package letters informing ACS respondents they were required to complete both the ACS and Census forms. We developed and tested envelopes with a green text box and the survey name, and later, "the U.S. Census Bureau" above the survey name. In the later 2010 split-panel test, the envelopes and letters yielded significantly higher response rates than the controls.
Laurie Schwede. (2013). Cognitive Testing of Modified American Community Survey Envelopes and Letters for Use during the 2010 Census: ACS Messaging Project Final Report on Phases 1 and 2. Center for Survey Measurement Study Series (Survey Methodology #2013-16). U.S. Census Bureau. Available online at <http://www.census.gov/srd/papers/pdf/ssm2013-16.pdf>.