OTCase-ControlJournal of intellectual disability research : JIDR2025

Personality Trait Profiles in People With Mild Intellectual Disability: A Comparative Study.

Renate A van der Heijden, Paul T van der Heijden, Hubert P L M Korzilius and 2 others

PMID 40776389

WHAT IT FOUND

People with mild intellectual disability report personality traits similar to those with average education, despite some small differences.

Clinicians should assess these traits directly rather than assuming they stem solely from intellectual impairment.

Key findings

01Participants with mild intellectual disability showed significantly higher scores on affective lability, anxiousness, identity problems, insecure attachment and suspiciousness, and lower scores on narcissism and social avoidance compared to the average education group.

02There were no significant differences in personality trait facets between the mild intellectual disability group and the borderline intellectual functioning group, except for social avoidance.

03The overall personality profiles of all three groups were similar in type and severity, suggesting similar clinical decisions and treatment approaches are appropriate.

STILL TO COME

How it was doneWhat they foundWhat it means for OTs

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What it does not show

Group allocation was based on existing DSM diagnoses from patient files, without re-verifying the diagnostic criteria or assessments used. The study did not control for general psychopathology (e.g., anxiety, depression), which may have influenced personality trait scores. The mode of administration for the MID and BIF groups (interview-assisted with item simplification) introduces potential bias, and the effects of these adaptations are not well researched. The AVE group data was derived from a different instrument version (DAPP-BQ converted to DAPP-SF) than the MID and BIF groups.

Declared interests

The authors declare no conflicts of interest. The study was funded by GGZ Oost Brabant.

The easy way to misread this

Do not assume that the small differences in personality traits between the mild intellectual disability group and the average education group indicate that the traits are caused by the intellectual disability itself. The overall profiles were similar, and the study did not control for comorbid mental health conditions which could explain the variations.

Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →