SLPOtherJournal of autism and developmental disorders2017

Measuring Theory of Mind in Adults with Autism Spectrum Disorder.

Neil Brewer, Robyn L Young, Emily Barnett

PMID 28275927

WHAT IT FOUND

Adults with autism scored lower than matched controls on a new video test of understanding social interactions.

The difference was seen only when groups were compared, and some adults with autism performed in the typical range, so it is not a diagnostic or severity marker.

Key findings

01On the final A-ToM social scale, adults with ASD averaged 9.1 of 12 points, while typically developing adults averaged 10.4 of 12 points.

02After verbal IQ was taken into account, the A-ToM social score helped distinguish the ASD group from the control group, but the A-ToM physical score did not.

03The ASD group showed marked variability on the social scale, including some extremely low scores.

STILL TO COME

How it was doneWhat they foundWhat it means for SLPs

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What it does not show

The ASD and control groups were not equivalent on verbal IQ. The ASD group had lower verbal comprehension scores, and verbal IQ helped predict group membership, so some social test difference may reflect verbal or language demands. The study excluded adults with performance IQ below 85, so it does not show how the test would perform for adults with intellectual disability. The item set was selected from the same sample that was later compared, so the final social items were chosen partly because they separated the groups. The ASD sample came from autism services, previous research participants, and flyers, while the control sample was mostly university students or transition-to-university participants. This may not represent all adults with ASD or all typical adults. The paper did not show that A-ToM scores predict real-world social functioning, diagnosis, treatment response, or adaptive skills. No age or gender norms were available.

The easy way to misread this

Do not treat a low A-ToM social score as proof that an adult has a Theory of Mind deficit or as a diagnostic marker for autism. Adults with ASD and controls overlapped on the social scale, some adults with ASD scored near ceiling, and the score did not track self-reported autism severity.

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