Orton-Gillingham and Orton-Gillingham—Based Reading Instruction

We checked this card's citation and the finding we state against the source's own page or record in October 2026.

What it found

Of twelve studies, five found Orton-Gillingham instruction better on every outcome measured, four on some outcomes, two found the comparison instruction better, and one found no difference. Given how few studies there were, their lack of rigor and the inconclusive results, the authors concluded more research is needed before a scientific basis can be established.

What kind of study it is

Design

Review

Weight

Adds context: a review or a weaker design, which doesn't move a card's rating on its own.

Sample

12 experimental or quasi-experimental studies with elementary, adolescent and college students

Read it

doi.org/10.1177/00224669060400030501

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Cited in the Library

• Orton-Gillingham