Question: The occurrence of a traditionally-defined ASD in an additional child occurred in 10.9%of the families. An additional 20% of non-ASD-affected siblings had a history of language delay,half of whom had exhibited autistic qualities of speech. Quantitative characterization using the SocialResponsiveness Scale (SRS) supported previously-reported aggregation of a wide range ofsubclinical (quantitative) autistic traits among otherwise unaffected children in multiple-incidencefamilies, and a relative absence of quantitative autistic traits among siblings in single-incidenceautism families. Girls whose standardized severity ratings fell above a first percentile severitythreshold (relative to the general population distribution) were significantly less likely to have elicitedcommunity diagnoses than their male counterparts. Need Assignment Help?