Weakened Bayesian Calibration for Tactile Temporal Order Judgment in Individuals with Higher Autistic Traits.
Makoto Wada, Yumi Umesawa, Misako Sano and 3 others
PMID 35064873WHAT IT FOUND
People with higher autistic traits showed a weaker bias in judging which hand was touched first after repeated stimulation.
This suggests they rely less on past experience when processing touch, which may explain why sensory input feels more intense or 'too real' for some individuals with autism.
Key findings
01Typically developing adults with lower autistic traits showed a significant positive aftereffect in tactile temporal order judgment, whereas those with higher autistic traits did not.
02Adults with ASD did not show a significant positive aftereffect, similar to the high-autistic-traits group in the typically developing population.
03The strength of the aftereffect correlated negatively with autistic traits, meaning higher autistic traits were associated with a weaker reliance on prior sensory experience.
STILL TO COME
How it was doneWhat they foundWhat it means for OTs
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What it does not show
The sample size for participants with ASD was very small (n = 8), limiting the generalizability of the findings. Participants with ASD had diverse backgrounds, including additional diagnoses like ADHD and various psychiatric medications, which may have influenced results. The study used a non-clinical measure (AQ score) to group typically developing participants, which does not equate to an ASD diagnosis. The relationship between specific medications and the observed irregularities in two participants is speculative and based on single cases.
Declared interests
The study was funded by the Ministry of Education, Culture, Sports, Science and Technology, the Japan Society for the Promotion of Science, and the Japan Science and Technology Agency. No other conflicts of interest were declared.
The easy way to misread this
Do not assume that a lack of sensory prediction bias indicates an ASD diagnosis. The study explicitly notes that typically developing individuals with high autistic traits also showed this pattern, and the AQ score is not a diagnostic tool. Furthermore, the small sample size and medication effects mean these findings are theoretical rather than clinically actionable for diagnosis.