Shenakht Journal of Psychology & Psychiatry

Introduction: Given the high prevalence of obsessive-compulsive disorder (OCD), it is essential to investigate the underlying psychological mechanisms contributing to its symptoms.
Aim: The present study aimed to investigate the mediating role of experiential avoidance in the relationship between intolerance of uncertainty and obsessive-compulsive symptoms.
Methods: This correlational study employed structural equation modeling. The statistical population of this study included all students studying at Ardakan University between 2023-2024 academic year. The research sample consisted of 342 students, selected using convenience sampling. Data were collected using the Maudsley Obsessive–Compulsive Inventory, Carleton’s Intolerance of Uncertainty Scale, and Bond’s Acceptance and Action Questionnaire. Analyses were conducted using SPSS 26 and AMOS 24.
Results: Intolerance of uncertainty had a direct, positive effect on experiential avoidance (β = 0.848, p < 0.001), and experiential avoidance had a direct, positive effect on obsessive–compulsive symptoms (β = 0.725, p < 0.001). The direct effect of intolerance of uncertainty on obsessive–compulsive symptoms was not significant (β = 0.033, p = 0.798). Experiential avoidance significantly mediated the relationship between intolerance of uncertainty and obsessive–compulsive symptoms (β = 0.615, p < 0.001).
Conclusion: Experiential avoidance significantly mediates the association between intolerance of uncertainty and obsessive–compulsive symptoms. Interventions targeting OCD may benefit from addressing intolerance of uncertainty and reducing experiential avoidance to improve clinical outcomes.