Fundamental behavioral and neurophysiologic relationships between sensory processing, intolerance of uncertainty, and autistic traits in children: A hybrid approach.

This research looked at how sensory challenges, difficulty with uncertainty, and autism traits relate to each other in children's brains. They studied 56 children (some autistic, some not) using questionnaires and brain scans. They found these traits are connected and exist on a spectrum across all children, not just autistic ones. The brain scans showed how different brain areas work together when children have sensory differences or struggle with uncertainty.

This study examined relationships between sensory processing, intolerance of uncertainty (IU), autistic traits, and brain connectivity in 56 children (30 autistic, 26 non-autistic). Researchers used behavioral assessments and resting-state functional MRI to investigate how these factors relate across both groups. Results showed significant correlations between sensory processing, autistic traits, and IU across all participants. Brain imaging revealed strong associations between sensory, large-scale resting state, and cerebellar networks with behavioral scores.

The findings suggest these behaviors exist on a continuum throughout the general population, with overlapping scores between autistic and non-autistic children, supported by neurobiological evidence of functional connectivity between sensory cortices and brain networks.

Findings support dimensional approaches to understanding autism-related traits and sensory differences. Clinicians should consider intolerance of uncertainty alongside sensory processing in assessments. The neurobiological correlates may inform targeted interventions addressing sensory-uncertainty relationships across the autism spectrum.

Small sample size (n=56) limits generalizability. Cross-sectional design prevents causal inferences. The study design type is unclear from the abstract. Specific methodological details about brain imaging analysis and behavioral measures are not fully described in the abstract.

Sensory differences are common and often challenging for autistic children. Furthermore, atypical sensory processing is associated with autistic traits and other autism-related behaviors, such as intolerance of uncertainty (IU). Such traits and their relatedness vary continuously across autistic and non-autistic children alike. However, the underlying neural correlates of these continuous variables, and their associations, are not well understood.

Therefore, this study examined relationships between sensory processing, IU, autistic traits, and associated resting state brain connectivity, across a sample of both autistic (n = 30) and non-autistic (n = 26) children. In addition to computing behavioral correlations between these factors, we carried out independent component network functional connectivity analysis to investigate associations between cortical and cerebellar networks and behavioral results between groups and across our entire sample. Across-group correlations between sensory processing, autistic traits, and IU were significant. In addition, data demonstrated overlapping sensory processing and intolerance of uncertainty scores, spanning the groups.

Brain (rs-fMRI)-behavioral relationships revealed strong associations between sensory, large-scale resting state, and cerebellar networks and behavioral scores. Overall, our findings suggest that sensory differences are related to IU and autistic traits across the population. Neurophysiologic data pointed to functional connectivity between sensory cortices and supramodal brain networks. These findings provide evidence for the continuous variation of behaviors common to autism throughout the entire population and their neurobiological correlates.