Assessing Deception Differences with Mimicry Deception Theory.

Mimicry Deception Theory (MDT) argues that deception varies along a long- to short-term continuum. Long-term deception involves complex deception, community integration, slow resource extraction, and low detectability, whereas short-term deception is the opposite. To date, no self-report scale exists that assesses a dispositional orientation toward long-term deception. Across four studies, we developed and validated a Mimicry Deception Scale (MDS) to assess individuals' dispositional orientation toward long-term deception. Using theoretically driven items, we found a reliable four-factor structure through exploratory and confirmatory factor analyses. Further, MDS components were strongly correlated and had acceptable internal consistency. For convergent validity, long-term MDS positively correlated with Machiavellianism, conscientiousness, and planning. Finally, the test-retest reliability of the MDS was acceptable, and the complexity facet of the MDS predicted successful lying over time. The findings have implications for how to profile, identify, and recognize patterns of deception, especially with respect to long-term patterns using self-report.