Research

Twenty-five studies reviewed by the WWC investigated the effects of Corrective Reading. One study (Torgesen et al., 2006) was a randomized controlled trial that met WWC evidence standards. The remaining 24 studies did not meet evidence screens.

Torgesen et al. (2006) examined the effects of Corrective Reading on 79 third-grade students in eight school units¹ in Pennsylvania. ² Students in the comparison group participated in the regular reading program at their schools.

Extent of evidence

The WWC categorizes the extent of evidence in each domain as small or medium to large (see the What Works Clearinghouse Extent of Evidence Categorization Scheme). The extent of evidence takes into account the number of studies and the total sample size across the studies that met WWC evidence standards with or without reservations. ³

The WWC considers the extent of evidence for Corrective Reading to be small for alphabetics, fluency, and comprehension. No studies that met WWC evidence standards with or without reservations addressed general reading achievement.