Fig. 2: Distribution of IQ scores in neurofibromatosis type 1 (NF1) individuals with intragenic genotypes.

Density plots and histograms for full-scale IQ (FSIQ) (a), verbal IQ (VIQ) (b), and performance IQ (PIQ) (c). Solid blue lines and light blue bars show the distribution in NF1 individuals with intragenic genotypes (no chromosomal microdeletions [CMD]; n = 470). Gray dashed lines are reference normal distributions with the same mean as in the NF1 data and an SD of 15.