Obsessive-compulsive personality disorder (OCPD) is a high-prevalence personality disorder characterized by subtle but stable interpersonal dysfunction. There have been only limited studies addressing the behavioral patterns and cognitive features of OCPD in interpersonal contexts. The purpose of this study was to investigate how behaviors differ between OCPD individuals and healthy controls (HCs) in the context of guilt-related interpersonal responses.

A total of 113 participants were recruited, including 46 who were identified as having OCPD and 67 HCs. Guilt-related interpersonal responses were manipulated and measured with two social interactive tasks: the Guilt Aversion Task, to assess how anticipatory guilt motivates cooperation; and the Guilt Compensation Task, to assess how experienced guilt induces compensation behaviors. The guilt aversion model and Fehr–Schmidt inequity aversion model were adopted to analyze decision-making in the Guilt Aversion Task and the Guilt Compensation Task, respectively.

Computational model-based results demonstrated that, compared with HCs, the OCPD group exhibited less guilt aversion when making cooperative decisions as well as less guilt-induced compensation after harming others.

Our findings indicate that individuals with OCPD tend to be less affected by guilt than HCs. These impairments in guilt-related responses may prevent adjustments in behaviors toward compliance with social norms and thus result in interpersonal dysfunctions.

Interpersonal dysfunction has been proposed as an important maintenance factor in chronic worry and generalized anxiety disorder (GAD). Perceptions of problems and the problem-solving process as threatening, and unhelpful (e.g. avoidant, impulsive) problem-solving styles are implicated in worry and have also been suggested to be associated with dysfunctional interpersonal styles.

The present study assessed the relationships between interpersonal dysfunction and problem-solving orientation, approach, and effectiveness in a sample of individuals high in chronic worry and investigated the indirect effect of interpersonal dysfunction on GAD symptom severity through negative problem-solving beliefs and approaches.

Fifty-nine community participants completed questionnaires and an interpersonal problem-solving task.

Greater interpersonal dysfunction was significantly associated with greater negative problem-solving orientation and greater habitual avoidant and impulsive/careless problem-solving styles. Greater interpersonal dysfunction was associated with poorer effectiveness of solutions when the task problem involved conflict with a romantic partner. Negative problem-solving orientation fully mediated the relationship between interpersonal dysfunction and GAD symptoms.

These findings support that problem-solving processes are implicated in interpersonal dysfunction and that negative beliefs about problem-solving account for the relationship between interpersonal dysfunction and GAD symptoms. Theoretical implications are discussed.