Predicting Obsessive–Compulsive Symptom Severity Using Models of Cognitive Inhibition and Perfectionism Dimensions

Objective: The objective of the present study was to determine the unique and incremental value of cognitive inhibition models and perfectionism dimensions in predicting obsessive-compulsive symptom severity.Methods and Materials: This study utilized a cross-sectional, correlational design with a community sample of ۴۳۵ adults from Canada (mean age = ۲۸.۴years; ۶۴%female). Participants completed a battery of measures including the Obsessive-Compulsive Inventory-Revised (OCI-R) to assess symptom severity, and the Hewitt and Flett Multidimensional Perfectionism Scale to evaluate self-oriented, other-oriented, and socially prescribed perfectionism. Cognitive inhibition was assessed using both subjective and objective measures: the White Bear Suppression Inventory (WBSI) for thought suppression, and a computerized Stop-Signal Task (SST) yielding a Stop-Signal Reaction Time (SSRT) for behavioral response inhibition. Data were analyzed using a three-step hierarchical multiple regression.Findings: The final hierarchical regression model accounted for ۴۸.۵%of the total variance in obsessive-compulsive symptom severity. Demographic variables (Step ۱) explained ۴.۲%of the variance. The addition of cognitive inhibition measures (Step ۲) significantly explained an additional ۳۵.۸%of the variance (ΔR^۲=۰.۳۵۸). Finally, perfectionism dimensions (Step ۳) contributed an incremental ۸.۵%(ΔR^۲=۰.۰۸۵). In the final comprehensive model, significant positive predictors of obsessive-compulsive severity included subjective thought suppression (β=۰.۳۲, p<۰.۰۰۱), socially prescribed perfectionism (β=۰.۲۴, p<۰.۰۰۱), objective SSRT (β=۰.۱۵, p<۰.۰۱), and self-oriented perfectionism (β=۰.۱۴, p<۰.۰۱). Age was a significant negative predictor (β=-۰.۰۹, p<۰.۰۵), while gender and other-oriented perfectionism were not significant in the final model.Conclusion: Obsessive-compulsive symptom severity is robustly predicted by a pathological synergy between extreme perfectionistic standards and fundamental neurocognitive deficits in behavioral and cognitive inhibitory control. Objective: The objective of the present study was to determine the unique and incremental value of cognitive inhibition models and perfectionism dimensions in predicting obsessive-compulsive symptom severity. Methods and Materials: This study utilized a cross-sectional, correlational design with a community sample of ۴۳۵ adults from Canada (mean age = ۲۸.۴years; ۶۴%female). Participants completed a battery of measures including the Obsessive-Compulsive Inventory-Revised (OCI-R) to assess symptom severity, and the Hewitt and Flett Multidimensional Perfectionism Scale to evaluate self-oriented, other-oriented, and socially prescribed perfectionism. Cognitive inhibition was assessed using both subjective and objective measures: the White Bear Suppression Inventory (WBSI) for thought suppression, and a computerized Stop-Signal Task (SST) yielding a Stop-Signal Reaction Time (SSRT) for behavioral response inhibition. Data were analyzed using a three-step hierarchical multiple regression. Findings: The final hierarchical regression model accounted for ۴۸.۵%of the total variance in obsessive-compulsive symptom severity. Demographic variables (Step ۱) explained ۴.۲%of the variance. The addition of cognitive inhibition measures (Step ۲) significantly explained an additional ۳۵.۸%of the variance (ΔR^۲=۰.۳۵۸). Finally, perfectionism dimensions (Step ۳) contributed an incremental ۸.۵%(ΔR^۲=۰.۰۸۵). In the final comprehensive model, significant positive predictors of obsessive-compulsive severity included subjective thought suppression (β=۰.۳۲, p<۰.۰۰۱), socially prescribed perfectionism (β=۰.۲۴, p<۰.۰۰۱), objective SSRT (β=۰.۱۵, p<۰.۰۱), and self-oriented perfectionism (β=۰.۱۴, p<۰.۰۱). Age was a significant negative predictor (β=-۰.۰۹, p<۰.۰۵), while gender and other-oriented perfectionism were not significant in the final model. Conclusion: Obsessive-compulsive symptom severity is robustly predicted by a pathological synergy between extreme perfectionistic standards and fundamental neurocognitive deficits in behavioral and cognitive inhibitory control.

کلیدواژه ها:

Obsessive-Compulsive Disorder ، Cognitive Inhibition ، Perfectionism ، Thought Suppression ، Response Inhibition