From 2008 to present, the Skin Tone IAT was available on the Project Implicit UK website (https://implicit.harvard.edu/implicit/uk/selectatest.jsp Click on “Skin-tone” to try it yourself). The Skin Tone IAT includes one standard IAT (Light Skin face vs. Dark Skin face; Good vs. Bad objects), sets of explicit measures on attitudes related to light skin/ dark skin (such as feeling thermometer for light skin/dark skin people etc.), set of demographic questions (age, gender, race, major, political identity, etc.), and debriefing questions about how respondents thought about their IAT score after the task. From 2008 to the end of 2016, there are 40,211 session IDs created for Skin Tone IAT, and the overall completion rate is around 32.1%. There are 18,737 respondents who completed the standard IAT part of the task, which is 46.6% of the total respondents. Please contact Project Implicit at admin@projectimplicit.net for any question, comment or zip code data request.