Personality Organization, Childhood Adversity, and Paranoid Thinking: Moderating and Mediating Pathways

Objectives: The study investigated the relationship between personality organization, childhood trauma, and paranoid thinking. It is hypothesized that personality organization mediates as well as moderates the link between paranoia and childhood adversity.

A mixed sample of patients and control participants (N = 119; 76% psychiatric patients; 71% female) was diagnostically assessed according to psychopathology (SCID I and II, BSI-53), personality organization (STIPO), and childhood trauma (CTQ). Mediation effects were analyzed within a Bayesian path modeling approach. We assessed potential moderation effects of personality organization by estimating interaction effects in the SPSS PROCESS macro.

Significant positive correlations were found between childhood trauma, personality organization, and paranoid thinking (all p < 0.001). Mediation analysis showed that personality organization partially mediated the relationship between childhood trauma and paranoid thinking (indirect effect, B = 0.14, 95% CrI [0.07, 0.23], p < 0.01), however, only if not corrected for general psychiatric symptom load. In contrast, moderation analysis indicated that personality organization moderated the relationship (ΔR2 = 0.02, F(6,112) = 4.93, p < 0.05), if controlled for unspecific psychopathology, with stronger personality dysfunction intensifying the link between childhood trauma and paranoid thinking.

The study generally supports the hypothesis that personality organization plays a critical role in linking childhood trauma to paranoid thinking, acting as both mediator and moderator. This suggests that deficits in personality structure partly explain and modulate the association of childhood adversity with paranoid ideation. The complex role of general psychopathology in this relationship is discussed.