(1) a feedback group, which received feedback on accuracy following each videotape judgment,
(2) a feedback cue information group, which received feedback and information on empirically based cues to deception, and (3) a control group, which did not receive feedback or the cue information. These groups were tested to compare their performance with the parole officer group and to help determine whether any improvements in deception detection accuracy that might be observed were a result of practice, feedback, and/or the cue information provided.