Characteristics and correlates of aggressive behavior in autistic youths.

All data came from caregiver self-report and rating measures, so the study did not use observations or reports from the youths or other family members. The study measured everything at one time, so it cannot show whether sleep, stress, sibling problems, or other factors caused aggression or resulted from it. Intellectual disability was based on caregiver report, not direct cognitive testing. The sample was mostly White, college-educated, middle-income mothers of verbally communicating male youths without co-occurring intellectual impairment, so results may not generalize to more diverse families or youths with greater support needs. The study did not examine mental health symptoms such as anxiety or depression alongside aggression.

The authors declared no conflicts of interest. The paper lists NIH extramural research support.

Do not read the associations as proof that changing sleep, caregiver stress, or sibling conflict will reduce aggression. The study is cross-sectional and caregiver-report, so it cannot show cause or treatment effect.