Intervention effects on WJIII passage comprehension were moderated by pretest: only students starting at or above the 60th percentile benefited¶

Claim · All claims
Evidence · 1 study · causal r3 · q2
Currency · newest study 2016 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Moderation of treatment effects by baseline WJIII passage comprehension was marginal overall, with positive moderation when centered pretest scores exceeded 5.70 (60th percentile). → Wanzek et al. 2016

Evidence¶

Wanzek et al. 2016¶

Jeanne Wanzek, Yaacov Petscher, Stephanie Al Otaiba, Shawn C. Kent, Christopher Schatschneider, Martha Haynes, Brenna K. Rivas, Francesca G. Jones. (2016). Examining the Average and Local Effects of a Standardized Treatment for Fourth Graders with Reading Difficulties. https://eric.ed.gov/?id=ED577133

q2 · i? · causal · r3

Exploratory moderation analysis with simple slopes (Preacher, Curran, & Bauer methods) on the WJIII passage comprehension outcome; the authors describe the baseline moderation as marginal. With a mean pretest of 482, the treatment-posttest relation was positively moderated when pretest was at least 488. No moderation was found for GMRT comprehension.

"The test revealed that moderation existed when centered pre-test scores on the WJIII passage comprehension were greater than 5.70 (60th percentile)."

Discussion¶

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