Objective: The present study aimed to investigate whether the
dysfunctional obsessive beliefs are specific to obsessive-compulsive
disorder (OCD) using three different clinical groups including OCD,
depression, and anxiety and a control group of university students.
Method: The participants of the study comprised three patient groups
with OCD (n=53), major depressive disorder (MDD, n=67), anxiety
disorders (AD, n=73), and a group of university students (n=477). The
short version of the Obsessive Belief Questionnaire (OBQ-20) was used
to measure obsessive beliefs. The Semi-Structured Clinical Interviews
for DSM-IV-TR (SCID-I), the Obsessive-Compulsive Inventory-
Revised Form, the Beck Depression Inventory, and the State-Trait
Anxiety Inventory-Trait Form were used to assess the severity of the
Results: The scores of the three patient groups were significantly
higher on the OBQ-20 as compared to the university students. It is
noteworthy that the OBQ-20 scores did not significantly differ between
the three patient groups except on the ‘importance of thought’ (ICT)
subscale showing significantly higher scores in the group with OCD in
comparison to the patients with depression and anxiety disorders.
Conclusion: The results suggest that obsessive beliefs may have a
transdiagnostic mechanism with a possible role in the etiology and
maintenance of a broad range of different psychopathologies, except in
relation to the ‘importance and control’ of thoughts. Investigating the
common processes underlying different psychopathologies is important
for the etiological explanation and future treatment of the disorders.