Pretend you are a police officer. You will be shown a lineup that an eyewitness saw earlier. Because the lineup may or may not have included a previously witnessed suspect, this eyewitness may have either chosen to identify a face from the lineup or responded "Not Present," with their decision highlighted in red. Included with each lineup is the eyewitness's written expression of certainty in their decision.

Your task will be to translate the eyewitness's written expression onto a numeric confidence scale. Before you rate the actual lineup, you will be shown an example of this task involving a yellow smiley face that the eyewitness definitely saw. Keep in mind that for the actual lineup, the suspect may or may not have appeared.

Click here to continue to the study.