Children with autism lack auditory looming bias seen in typical development

This primary observational study examined auditory processing in young children by measuring EEG P1 peak amplitude in response to intensity-rising (looming) and intensity-falling (receding) sounds. The study included 21 children with autism spectrum disorder (ASD), 16 with sensory processing concerns (SPC), and 30 with typical development (TD), all aged 3-4 years.

Key findings showed that both the SPC and TD groups exhibited a significant looming bias—greater P1 amplitude to looming than receding stimuli—as indicated by t-tests (TD: t(64)=6.87, p<.001; SPC: t(64)=4.07, p<.001). In contrast, the ASD group showed no such bias (p=.194). Additionally, the Rise-Fall Difference Score (RFDS) was significantly lower in the ASD group compared to the TD group (Z=-3.00, padj=.008), indicating reduced differentiation between looming and receding sounds.

These results suggest that children with ASD may process auditory motion differently, potentially contributing to sensory challenges. However, the study is limited by its small sample size and lack of reported setting, follow-up, or adverse events. The findings are preliminary and require replication in larger, more diverse samples before clinical application.

For clinicians, this research highlights a neurophysiological marker of altered auditory processing in autism, but it does not yet inform diagnostic or therapeutic decisions. Further studies are needed to explore the relationship between this EEG measure and real-world sensory behaviors.