Exploring the (Mal)adaptive Consequences of Self-Deceptive Enhancement: A Narrative Review

Introduction. Despite the abundance of literature on the nature and functions of self-deceptive enhancement (SDE), there is still a lack of consensus about whether and when SDE is adaptive or maladaptive for individuals. This question of the costs and benefits of SDE is of particular clinical relevance and is the focus of the present literature review. Method. Building on an earlier meta-analytic review by Dufner et al. (2019), a total of 53 additional studies were identified and included in this review. Results. 25 of the studies supported the adaptiveness of SDE, 27 supported the maladaptiveness of SDE, and two supported mixed findings. Discussion. While SDE appears to be commonplace and experienced as beneficial in the short term, its longer-term negative consequences for learning, relationships, ethical behavior, and substance use recovery seem to outweigh its immediate benefits. However, these findings are limited by methodological issues related to the reliance on self-report measures, lack of consensus about the definition of SDE, and lack of clinical studies focused on SDE. Future studies should clarify the construct of SDE versus positive illusions and other related constructs and should examine SDE’s role as a possible maintaining factor for psychopathology beyond substance use disorders.