Compulsion Profile Differences Indicate Distinct Functional Mechanisms in Autistic and Non-Autistic University Students.

This study looked at repetitive behaviors in autistic and non-autistic university students. Researchers found that autistic students had more behaviors focused on self-regulation and sensory needs (like repetition and counting), while non-autistic students had more behaviors aimed at reducing anxiety (like checking). The link between anxiety and repetitive behaviors was weaker in autistic students, suggesting these behaviors serve different purposes for autistic people compared to those with OCD.

This study examined differences in compulsive behaviors between 39 autistic university students and 50 non-autistic students (25 with high OCS, 25 with low OCS). Factor analysis of Yale-Brown Obsessive-Compulsive Scale items revealed two distinct types of compulsions: regulatory/sensory (repetition, counting, hoarding) and anxiety-reduction (checking, organizing). Autistic students showed significantly more regulatory/sensory compulsions but fewer anxiety-reduction compulsions compared to non-autistic groups. Anxiety levels correlated with OCS in non-autistic participants but not in autistic individuals, suggesting compulsions in autism serve different functions than in classical OCD.

These findings may explain why traditional exposure and response prevention therapy is less effective for autistic individuals.

Findings suggest traditional CBT and exposure-response prevention may be less effective for autistic individuals because their compulsions serve regulatory rather than anxiety-reduction functions. Treatment approaches should consider sensory modulation and self-regulation needs rather than focusing primarily on anxiety reduction mechanisms used in classical OCD treatment.

Small sample size limited to university students may not represent broader autistic population. Cross-sectional design cannot establish causality. Study relied on self-report measures. Unknown study methodology limits assessment of potential biases or confounding factors.

Autistic individuals often exhibit high rates of obsessive-compulsive symptoms (OCS), yet traditional cognitive-behavioral therapy (CBT), especially exposure and response prevention (ERP), tends to be less effective for them. This may be due to differences in the function of compulsive behaviors: while OCD-related compulsions are typically ego-dystonic and aimed at reducing anxiety, autistic compulsions may be ego-syntonic, serving regulatory or sensory modulation purposes. This study investigated whether compulsions in autism are more aligned with regulation and sensory modulation than with anxiety reduction. Participants included 39 autistic university students, 25 non-autistic students with high OCS, and 25 non-autistic students with low OCS.

A factor analysis of seven binary items from the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS-I) revealed two factors explaining 58% of the variance. The first factor showed high loadings for Repetition, Counting, and Hoarding compulsions, reflecting regulatory and sensory modulation processes. The second factor showed high loadings for checking and organizing compulsions that were previously associated with anxiety reduction. Chi-square analyses showed autistic students reported significantly more regulatory/sensory compulsions than low-OCS individuals.

For anxiety-reduction compulsions, autistic students reported significantly fewer positive responses than both non-autistic groups. Trait and state anxiety correlated with OCS levels in non-autistic participants, but not in autistic individuals. These findings indicate that compulsions in autism may reflect distinct functional mechanisms compared to those in classical OCD. Specifically, the weaker association with anxiety or threat reduction suggests that ERP-based CBT, which targets anxiety-driven compulsions, may be less effective for autistic individuals.

Broader implications for both diagnosis and therapeutic approaches are discussed.