Children who exhibit traits of autism and attention-deficit/hyperactivity disorder often face elevated risks for emotional and behavioral problems as they grow, but the social pathways linking these traits to mental health are complex. A long-term study published in Psychological Medicine suggests that difficulties with classmates, schoolwork, and family members do not simply follow neurodevelopmental traits in a straight line. Instead, daily social struggles and mental health issues appear to be linked in both directions over time, which can create self-reinforcing cycles as students develop.
Autism spectrum disorder, commonly known as ASD, involves differences in social communication, social interaction, and patterns of behavior or interests. Attention-deficit/hyperactivity disorder, or ADHD, is characterized by persistent patterns of inattention, hyperactivity, and impulsivity. The two conditions exist on a continuum, meaning many children exhibit visible traits without having a formal clinical diagnosis. Even when these characteristics fall below diagnostic thresholds, children are at high risk for emotional distress, including internalizing problems like anxiety and depression, or externalizing problems like anger and disruptive behaviors.
Previous research suggested that daily difficulties may help explain these links. For example, a 2018 longitudinal study of youth from childhood to age 18 found that elevated autistic traits increased the risk of developing depressive symptoms, an association explained in part by social difficulties such as bullying. Along the same lines, a 2020 study of adolescents indicated that childhood ADHD symptoms predicted adolescent depression in part due to academic setbacks and problems with peers.
Strained relationships with parents and peers also helped explain the link between attention difficulties and later depression in a 2013 study of two samples of youth, although academic difficulties did not independently explain this link in this research.
Because autistic traits and ADHD often coexist in the same individuals, researchers have faced a challenge in untangling the specific social barriers that arise uniquely from each set of characteristics. Many previous studies have examined autism or ADHD in isolation, making it difficult to understand the link between distinct traits and social adaptation in different contexts.
“In school settings, many children have mild traits of ASD or ADHD that do not meet diagnostic criteria, but they may still have difficulty with peers, learning, or relationships with adults,” lead author Eriko Hashimoto, a doctoral student at the Graduate School of Humanities and Sciences at Ochanomizu University in Tokyo, told PsyPost. “These children are at risk of being excluded from formal support systems. »
“However, we still know relatively little about how these traits relate to social adaptation and mental health over time,” Hashimoto explained. “Together with my supervisor and co-author, Professor Hiroyuki Ito, I wanted to fill this gap by examining these developmental associations over multiple years in a large community sample of school-age children.”
To study these questions, Hashimoto, Professor Hiroyuki Ito of the Faculty of Basic Research at Ochanomizu University, and their colleagues analyzed data from a large population cohort involving all public primary and secondary schools in a medium-sized municipality in Chubu, Japan. The final analysis included 9,619 students from an initial group of 11,549 children enrolled. Students were surveyed once per school year, from fourth to ninth grade, with data from 11 grade cohorts collected between 2012 and 2023. By gathering information from students, their parents, and their classroom teachers, the authors were able to capture behavioral and emotional patterns in both home and classroom environments.
Parents reported on their children’s autistic tendencies using a short version of the Autism Spectrum Screening Questionnaire and rated ADHD traits using the ADHD Rating Scale-IV. Students completed questionnaires detailing their subjective difficulties in three areas: keeping up with class work, conflicts with teachers, and arguments with family members. Problems with classmates were assessed using the Peer Relations subscale of the Strengths and Difficulties Questionnaire, combining student, teacher, and parent ratings into a single composite score.
Mental health outcomes were grouped into two broad categories. Internalizing problems, reflecting inner emotional distress such as anxiety and depression, combined child self-ratings on a depression scale with parent and teacher ratings of emotional symptoms. Externalizing problems, capturing apparent behavioral difficulties such as hostility and aggression, grouped student self-ratings with adult ratings of conduct problems. The researchers used cross-lagged structural equation modeling, an advanced statistical technique that tests whether one variable predicts changes in another variable over time while controlling for students’ gender and grade level.
The analysis produced standardized coefficients, which express the strength with which one measure predicts subsequent changes in another. According to the guidelines used by the authors for this type of analysis, values around 0.03 are considered small, 0.07 as medium, and 0.12 as large.
Results indicated distinct developmental patterns for autistic and ADHD traits. Autistic traits showed consistent links over time with later peer difficulties, showing standardized coefficients between 0.146 and 0.190 across school transitions, which fell within a wide range. Autistic traits were also related to later internalizing problems, with low to medium coefficients ranging from 0.068 to 0.097. In contrast, autistic traits were not consistently associated with later academic difficulties or conflicts with teachers.
ADHD traits showed a different pattern of association. High ADHD traits were related to later externalizing problems, with coefficients ranging from 0.064 to 0.118, with the strongest associations appearing in late elementary school. ADHD traits were also associated with higher levels of academic difficulties over time, particularly in fourth and fifth grades, but showed weak and mostly inconsistent links with direct later internalizing problems. Instead, academic difficulties themselves predicted later internalizing symptoms during elementary school, suggesting that learning difficulties may act as an intermediate pathway linking attention difficulties to emotional distress.
Rather than revealing one-way effects, the analyzes revealed notable bidirectional processes. For example, while peer problems predicted increases in later internalizing symptoms, higher levels of internalizing symptoms were also associated with worsening peer problems over time. Similarly, externalizing behaviors predicted more frequent conflicts with teachers and parents in later years, and these strained adult relationships were linked to later increases in behavioral difficulties. School problems consistently predicted greater family conflict in the following year, with coefficients ranging from 0.105 to 0.163.
The social environment also appears to impact parents’ ratings of neurodevelopmental traits. Peer problems were related to higher autistic traits in later years, with coefficients up to 0.164. Analogously, higher externalizing behaviors predicted higher ADHD traits in subsequent waves. These models suggest that neurodevelopmental traits might not be fixed and might change with a child’s social experiences, although they might also reflect changes in how parents perceive and evaluate their children’s traits once problems arise.
“An important message is that ASD and ADHD traits showed different patterns of association with later difficulties,” Hashimoto said. “These results highlight the importance of taking into account not only the individual characteristics of children, but also the social environments in which they develop.”
These findings are consistent with previous research on how childhood adversities manifest over time. The findings align with a study covered by PsyPost in 2026, which found that childhood ADHD traits were linked to greater psychological distress in midlife, in part through experiences of social exclusion in adulthood, although that research followed individuals into adulthood while the current study followed young people into middle school.
The observed links also touch on research covered by PsyPost in 2025 linking ADHD symptoms to emotional problems across development, although that earlier project pointed to shared genetic factors, based on twin data, as an underlying driver rather than school-based social pathways.
As with any research, there are some caveats to consider. “This study does not demonstrate causality,” Hashimoto noted. “The results show temporal associations, but do not prove that one factor directly causes another.”
“It is also important to emphasize that children with high ASD or ADHD traits are very diverse; our results describe group-level patterns and should not be interpreted as predictions for any particular child,” she stressed. “Additionally, we examined ASD and ADHD traits dimensionally in a general school population rather than focusing specifically on children with clinical diagnoses. »
There are a few other things to keep in mind. Most associations, including most links between traits and later mental health problems, were small to medium in size. Additionally, the questionnaire used to assess autism primarily captured a relatively narrow set of characteristics, focusing primarily on Asperger-like social and behavioral traits rather than the entire spectrum.
Future research could build on these findings by incorporating direct research…
Gn Health
