Fig. 2

Interaction between parent-reported and observed sensory over-responsivity (SOR) predicting heart rate responses to tactile stimuli. Figures depict inter-beat interval (IBI) change up to 30 s post-stimulus onset compared to the 5-seconds of inter-trial interval (ITI) rest prior to the stimulus, for (a) autistic (ASD) participants whose parents reported them having high tactile SOR and (b) ASD participants reported to have low tactile SOR, divided with a median split. Each figure shows differences between youth who showed high observed tactile SOR (green) or low observed tactile SOR (purple) during the SP3-D assessment, divided with a median split. In the group who had high parent-reported SOR only, youth with high observed tactile SOR showed reduced heart rate deceleration and increased acceleration in response to sensory stimulation compared to those who had low observed SOR