Figure 2

PCA plot of ADI-R profiles of subjects in the genetic disorder sample. Colors/numbers denoting genetic disorder subgroups. 1, 22q11.2 deletion syndrome; 2, Down’s syndrome; 3, Prader-Willi syndrome; 4, supernumerary marker chromosome 15; 5, tuberous sclerosis complex; 6, Klinefelter syndrome. ADI-R, Autism Diagnostic Interview-Revised; PCA, principal component analysis.