“Why Bother? There’s Always Another Question”: Shortening Bandura’s Mechanisms of Moral Disengagement Scale

Moral disengagement (MD), or the cognitive strategies used to avoid feelings of guilt in contexts of moral transgression, has been an established cognitive risk factor for engagement in antisocial and criminal behaviors. In justice-involved samples, MD is most frequently measured using the 32-item Mechanisms of Moral Disengagement Scale (MMD). The current study aims to develop a short-form version of the MMD with strong psychometric properties and predictive utility. Using data from a longitudinal study of justice-involved youth, we generated theoretically and data-driven short-form versions of the MMD. We then validated and compared the short-form versions to the full MMD in a different sample of justice-involved youth. Results indicate that a data-driven 11-item short form consistently performed well across both samples. Recommendations are made for future researchers interested in exploring MD, and implications in risk assessment are discussed.