There was a deletion of DOCK4 exons 38 to 52 (detected on the 300K array, log Bayes Factor = 44, validated by QMPSF and quantitative PCR) in a single dyslexia case, but no exonic deletions of DOCK4 were detected in 2091 control samples tested on the 550 K SNP array (p = .225, Fisher's exact test). Here, DOCK4 is linked to dyslexia.