The Heistad study showed an effect size for reading comprehension of .38 on the Minnesota Comprehensive Assessments (MCA).
The Christ & Davie study showed effect sizes of .66 for fluency with the Grey Oral Reading Test–Fourth Edition: Fluency (GORT 4: Fluency) and .66 for accuracy with the GORT 4: Accuracy.
The Tucker & Jones study showed effect sizes of .51 for rate with the GORT 4: Rate, .87 for accuracy with the GORT 4: Accuracy, and .75 for fluency with the GORT 4: Fluency.
Research Documents in the Knowledgebase
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