As discussed by Scerri and Schulte-Körne (2010) , heritability estimates of reading ability and reading deficits have a fairly significant range from about 30 to 70% ( DeFries et al., 1987 ; Stevenson et al., 1987 ; Castles et al., 1999 ; Davis et al., 2001 ; Gayán and Olson, 2001 ; Harlaar et al., 2005 ; Petrill et al., 2006 ; Bates et al., 2007 ; Friend et al., 2009 ), though the ages of participants and the specific reading constructs being measured vary ( Scerri and Schulte-Körne, 2010 ).
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