Abstract: This study examines the predictive validity of the HEXACOD personality model, which extends HEXACO by adding the Disintegration (D) factor to capture psychosis proneness. Based on a systematic review and meta-analysis of trait–outcome associations, we created three meta-analytic evidence gap maps (MetaEGMs) to visualize research coverage and identify gaps. Outcomes were grouped using three taxonomies: affects-behaviors-cognitions-desires (ABCD), theory of planned behavior (TPB), and life domains. Results support increased predictive validity for various Health, Citizenship, Social Life, Affects, and Cognitions outcomes. However, key areas such as motivational constructs and Finance, Leisure, and Achievement outcomes remain underexplored. Moderate average effect sizes and considerable heterogeneity highlight the need to examine moderators such as culture, age, and sample type. Future studies should focus on specific outcomes and diverse populations to improve precision and generalizability. Overall, the findings support the HEXACOD model’s predictive value and offer a clear avenue for future personality research.
Scherhag et al. (Thu,) studied this question.