Fig. 1From: Quantitative trait variation in ASD probands and toddler sibling outcomes at 24 monthsProband and sibling VABS-II composite score distributions. Histograms display a wide distribution of VABS-II adaptive behavior, communication, socialization, and motor composite scores for ASD probands and toddler siblings with and without ASD. Score distributions overlap for probands and toddler siblings, with younger siblings exhibiting generally better performance in all domains. Statistics comparing proband and sibling performance among pairs concordant for ASD are reported in Additional file 1: Table S3 in the online supplemental materialBack to article page