“…Prevalence data from several studies show large discrepancies, ranging from 12.5% to 85% (McArthur et al, 2000), with figures for reading disorders and SLI of similar magnitude. The more severe, extensive (several areas affected), and persistent the spoken language impairment, the greater the likelihood of observing a severe reading disorder (Bishop, 2001;Catts, Fey, Tomblin, & Zhang, 2002;Conti-Ramsden, Botting, Simkin, & Knox, 2001;Simkin & Conti-Ramsden, 2006;Snowling, Bishop, & Stothard, 2000;Vandewalle, Boets, Boons, Ghesquiè re, & Zink, 2012). Reading disorders affect both components of reading: word identification and reading comprehension, the latter being more frequently and more severely impacted (Bishop & Adams, 1990;Conti-Ramsden, Botting, Simkin, & Knox, 2001;Simkin & Conti-Ramsden, 2006).…”