Materials were added to the end of the Race task on the Project Implicit Demonstration site: https://implicit.harvard.edu/implicit/
Under Project Implicit Social Attitudes, select United States, Go!, I wish to proceed, and then select Race IAT.
When the study was run in 2011, the explicit questionnaire contained a bank of 243 items in addition to those reported in the manuscript. Participants were randomly assigned to complete 10 of them. These items were not analyzed as part of the study but appear in the file 'Explicit Bias Questionnaire.pdf' for reference.
Participants were randomly assigned to one of four versions of the Race IAT that varied the left/right position of the racial and evaluative categories. These features were not of interest in the current report.