Latest Research on ASD

Current findings in etiology, neurology, and cognition

Etiology

Origins & Causes

ASD is understood as a highly heritable, polygenic condition. Research consistently points to hundreds of genetic variants — both rare and common — that contribute to risk. Twin studies suggest heritability rates between 64–91%.

Environmental factors such as advanced parental age, prenatal exposure to certain chemicals or infections, and preterm birth have been associated with elevated risk. Importantly, vaccines have been thoroughly and repeatedly studied and have not been found to cause ASD.

Current research explores gene-environment interactions, the role of the prenatal immune environment, and epigenetic mechanisms that may influence how genetic risk is expressed.

Neurology & Cognition

Brain Structure & Function

Neuroimaging studies have identified differences in connectivity between brain regions in individuals with ASD — particularly in networks supporting social cognition, language, and executive function. Early brain overgrowth in the first years of life has been a consistent finding.

Research on the "predictive processing" framework suggests that autistic brains may weight sensory input differently, leading to heightened perceptual accuracy but increased sensitivity to unexpected stimuli.

Emerging research highlights the diversity within ASD — no single neurological profile defines all individuals, reinforcing the importance of individualized, strengths-based approaches in education and support.