SLPOtherJournal of autism and developmental disorders2017

Using Time Perception to Explore Implicit Sensitivity to Emotional Stimuli in Autism Spectrum Disorder.

Catherine R G Jones, Anna Lambrechts, Sebastian B Gaigg

PMID 28429189

WHAT IT FOUND

Adults with autism and adults without autism judged emotional pictures as lasting longer than neutral pictures by a similar amount.

Their automatic timing response did not differ between groups.

Key findings

01Adults with ASD and comparison participants did not differ significantly in how they judged whether emotional faces or wildlife pictures lasted closer to short or long durations.

02In planned comparisons, angry and fearful faces produced more long responses than neutral faces, and snarl and puppy images produced more long responses than flower images.

03Timing sensitivity, measured as how sharply participants distinguished short from long durations, did not differ between groups.

STILL TO COME

How it was doneWhat they foundWhat it means for SLPs

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What it does not show

The ASD group was small, with 20 valid participants in at least one condition and 18 in the face condition, so a modest difference between groups cannot be ruled out. The participants had mean full-scale IQ scores of 114.6 and 108.1, so results may not apply to people with ASD who have intellectual impairment. The study used static pictures and basic emotions, not videos or complex social situations, so it may not capture real-life emotion processing. No physiological arousal was measured, so the behavioural time estimates cannot confirm that arousal caused the overestimation. The only significant correlation with autistic traits did not survive correction for multiple tests, so it should be treated as exploratory. Some participants were excluded because their responses did not follow the task pattern, and Study 1 used self-reported autistic traits rather than diagnosed ASD.

The easy way to misread this

Do not conclude that people with autism have intact emotion recognition in everyday conversation. The study only tested simple static pictures and found no group difference in a timing task, so it does not show that social communication is typical.

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