Childhood Academic Performance: A Potential Marker of Genetic Liability to Autism.

Researchers studied the academic performance of 29 children who have a sibling with autism but don't have autism themselves. They found these siblings had more difficulty with language-related school subjects compared to other children. These academic challenges were linked to having more autism-like traits and having parents with autism-like traits too. This suggests that family members of autistic children may show subtle signs of autism genetics through their school performance, even when they don't have autism themselves.

This 2023 study examined academic performance patterns in 29 clinically unaffected siblings of individuals with autism spectrum disorder (ASD) to identify potential genetic markers. Researchers found that siblings showed lower performance in language-related academic skills, similar to patterns previously observed in parents of autistic individuals. These academic difficulties were associated with greater subclinical ASD-related traits in both the siblings and their parents, as well as increased symptom severity in their autistic sibling. The findings suggest that standardized academic testing may reveal childhood indicators of genetic liability to ASD among first-degree relatives, providing insights into heritable traits that express differently across family members.

Academic performance assessments may serve as early indicators of genetic liability to ASD in family members. This could inform family counseling and support services. However, findings need replication in larger samples before clinical application. May guide development of family-based screening approaches.

Small sample size of 29 siblings limits generalizability. Study design is unclear from the abstract. No comparison group details provided. Specific academic measures and statistical methods not described. Cross-sectional nature prevents causal conclusions about genetic liability.

Autism spectrum disorder (ASD), a heritable neurodevelopmental disorder, confers genetic liability that is often expressed among relatives through subclinical, genetically-meaningful traits, or endophenotypes. For instance, relative to controls, parents of individuals with ASD differ in language-related skills, with differences emerging in childhood. To examine ASD-related endophenotypes, this study investigated developmental academic profiles among clinically unaffected siblings of individuals with ASD (n = 29). Lower performance in language-related skills among siblings mirrored previously-reported patterns among parents, which were also associated with greater subclinical ASD-related traits in themselves and their parents, and with greater symptom severity in their sibling with ASD.

Findings demonstrated specific phenotypes, derived from standardized academic testing, that may represent childhood indicators of genetic liability to ASD in first-degree relatives.