Are Autistic Traits in Youth Meaningful Are Autistic Traits in Youth Meaningful? A Replication study in Non-referred Siblings of Youth with and without Attention-Deficit/Hyperactivity Disorder DOI: 10.21307/sjcapp-2016-012 Rate of ATs in siblings of Control probands (n = 234), siblings of ADHD probands without ADHD (n = 201), and siblings of ADHD probands with ADHD (n = 56). a Compared to siblings of Control probands. b Compared to siblings of ADHD probands without ADHD. *p < 0.05, **p < 0.005, ***p < 0.001