The relationship between the effect of hand visibility on visuotactile temporal resolution and autistic traits.

This research looked at how people with autism-like traits process touch and vision together. When participants couldn't see their hands, those with more autistic traits had trouble judging which came first - a vibration or a light. But when they could see their hands (real or rubber), this difference went away. The study suggests that seeing your hand helps people with autistic traits better coordinate touch and vision.

This study examined how autistic traits affect the ability to judge timing between visual and touch stimuli, particularly when hands are visible or hidden. Researchers used temporal order judgment tasks where participants received vibrations on their finger while seeing LED lights above their own hand or rubber hands. Results showed that individuals with higher autistic traits had poorer timing judgment when their hands were not visible, but this difference disappeared when hands were visible. Additionally, seeing one's own hand generally worsened timing judgment for all participants.

These findings suggest autistic traits specifically influence visuotactile temporal processing when sensory information is perceived as coming from external sources.

Results suggest that visual body awareness interventions might help improve sensory processing in individuals with autism. Therapeutic approaches could focus on enhancing visual-tactile integration when body parts are visible during sensory activities.

Sample size not reported, making it difficult to assess statistical power. Study type unclear. Limited to laboratory-based temporal order judgment tasks which may not reflect real-world sensory processing. Only examined subclinical autistic traits rather than diagnosed autism spectrum disorder.

Individuals with autism spectrum disorder (ASD) have atypical sensory processing, particularly when sensory stimuli are delivered from different modalities with a temporal lag of subseconds. Previous studies have suggested that individuals with ASD require a longer temporal lag to judge temporal orders of successive audiovisual stimuli than neurotypical individuals; however, it remains unclear whether a lower temporal resolution in the visuotactile domain is associated with an individual's autistic traits. In addition, a previous study demonstrated that visuotactile temporal resolution degraded when the participants saw a hand image on a display. In this study, we investigated whether the temporal resolution of the visuotactile stimuli degrades when the participant's own hand or rubber hands are visible, and whether the effect of the hand's visibility on the temporal resolution decreases according to an individual's autistic traits.

We used the temporal order judgment (TOJ) of the vibrotactile stimulus delivered to the participant's index finger and an LED attached above their own hand or rubber hand. Our findings suggest that when participants could not see their hand, temporal order judgment tended to be coarser in participants with higher autistic traits. However, this tendency was not observed when they could see both their own or the rubber hands. Moreover, temporal resolution degraded when the participants could see their own hands.

These results indicate that autistic traits influence the temporal resolution of visuotactile stimuli if they are delivered as external signals in TOJ.