Methods for removing bogus respondents 5

  Trap questions 6

  Automated prescreening 6

  Voter file matching 7

Distinct demographic patterns in flagged cases 9

Effect of screening on measures of data quality 10

  Yea-saying 10

  Open-end response quality 13

  Response order effects 14

How does screening affect questions about voter turnout and vote choice? 17

  All three screening methods increased estimated support for Harris 17

Appendix: What are bogus respondents? 19

Acknowledgments 20

Methodology 21

  Open-end coding 22