“…Sampling error associated with small studies could also produce considerable variability in apparent gender differences. With the exception of one large study conducted in Australia with data from approximately 1 million students (Wheldall & Limbrick, 2010), only a few studies have had sample sizes in the thousands (e.g., Flannery, Liederman, Daly, & Schultz, 2000; Jimenez et al, 2011; Miles et al, 1998; Rutter et al, 2004), and most studies have had small samples with fewer than 50 individuals with reading disability (e.g., Berger, Yule, & Rutter, 1975; Finucci & Childs, 1981; Jorm, Share, Matthews, & MacLean, 1986; Lewis, Hitch, & Walker, 1994; S. Shaywitz, Shaywitz, Fletcher, & Escobar, 1990).…”