Auditory Global-Local Processing Under Tonal Language Background: Effect of Attention and Autistic Traits.

Researchers tested how 37 young adults with different levels of autism traits process complex sounds in Mandarin Chinese. They found that people with more autism traits were better at hearing the 'big picture' patterns in musical tones rather than focusing on details. This suggests that people with autism may have intact or even enhanced abilities to process overall sound patterns, which could be helpful for diagnosis and therapy approaches.

This study examined auditory global-local processing in 37 Mandarin-speaking adults with varying autistic traits. Participants judged global and local pitch structures in nine-tone melodies under different attention conditions. Results showed a persistent global precedence effect (GPE) regardless of attention mode, with the global processing advantage expanding as autistic traits increased. The findings suggest that auditory global processing remains intact in autism and the broader autism phenotype, supporting the notion that individuals with autistic traits may show enhanced global processing patterns in auditory hierarchical tasks involving tonal language backgrounds.

Findings suggest auditory global processing strengths in autism could inform assessment and intervention approaches. Results may help refine early diagnosis methods using auditory tasks and support development of auditory-based interventions that leverage intact global processing abilities rather than focusing solely on deficits.

Small sample size (n=37) limits generalizability. Single cultural/linguistic background (Mandarin speakers) restricts broader applicability. Cross-sectional design prevents causal inferences. Unclear methodology details regarding participant selection and trait measurement approaches.

Neurotypical individuals show a robust "global precedence effect (GPE)" when processing hierarchically structured visual information. However, the auditory domain remains understudied. The current research serves to fill the knowledge gap on auditory global-local processing across the broader autism phenotype under the tonal language background. This study examined auditory global-local processing styles in 37 Mandarin-speaking young adults (age:= 20.35,= 2.32; 19 males) with varying autistic traits.

The participants were required to judge global and local pitch structures in nine-tone melodies with both congruent and incongruent conditions under both directed attention and divided attention modes. We found that GPE persisted independent of the attention modes during hierarchical processing. Autistic traits were among the potential contributors that reshaped GPE in auditory global-local processing under a tonal language background. Our study provides an initial investigation into auditory global-local processing among Mandarin-speaking individuals across a range of autistic traits, revealing the presence of the GPE effect during hierarchical pitch structure processing.

The advantage of global processing versus local processing expanded with increasing autistic traits, providing further support for the notion that auditory global processing may remain intact in autism and the broader phenotype. We highlight that GPE is a process of coarse-to-fine integration of sensory perception and cognitive feedback iteration, which both top-down and bottom-up processes wield influence on. These findings have implications for the study of atypical auditory processing in autism and may help to refine the early diagnosis and auditory-based intervention for autism. https://doi.org/10.23641/asha.28114118.