SLPCase-ControlJournal of autism and developmental disorders2026

The Behavioral Presentation of Autistic Adults in a Forensic Interview.

Katie Logos, Alliyza Lim, Neil Brewer and 1 others

PMID 40156638

WHAT IT FOUND

Autistic adults used longer speech hesitations and interpreted figurative language more literally than non-autistic adults, but showed no significant differences in eye contact, gestures, or repetitive movements.

These specific verbal behaviors may unfairly bias credibility judgments in forensic interviews.

Key findings

01Autistic adults displayed significantly longer verbal hesitations and more literal interpretation of figurative language compared to non-autistic adults.

02Autistic adults unexpectedly showed greater variation in vocal intonation than non-autistic adults, contrary to diagnostic expectations of monotone speech.

03There were no significant group differences in nonverbal behaviors such as eye contact, facial expression, or repetitive motor movements, nor in memory report accuracy.

STILL TO COME

How it was doneWhat they foundWhat it means for SLPs

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What it does not show

The sample size was small, and the study was conducted online, which may have reduced the social pressure and behavioral cues present in face-to-face forensic interviews. Participants were predominantly Caucasian and had average to above-average verbal intelligence, limiting generalizability to diverse or intellectually disabled populations. The study did not measure how observers actually judged the credibility of these behaviors, only the behaviors themselves. Bonferroni correction for multiple comparisons would have rendered all significant findings non-significant, suggesting the results should be interpreted with caution.

Declared interests

Funding was provided by the Australian Research Council, the Hamish Ramsay Fund, and The University of Adelaide. No specific conflicts of interest regarding commercial entities were declared in the provided text.

The easy way to misread this

Do not assume that the absence of significant differences in eye contact, gestures, or repetitive movements means autistic adults present typically in forensic settings. The study found that subtle verbal behaviors like hesitation and literal interpretation were the primary differentiators, and these may still significantly bias observer perceptions of credibility.

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 →