LiPS shows potentially positive effects on math: no statistically significant effect on the WJ–R Calculation subtest, but a positive effect size of 0.30 judged substantively important¶

Claim · All claims
Evidence · 1 study · causal r2 · q3 · i1 small
Currency · newest study 2010 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i1 Neither the study nor the WWC found a statistically significant effect on the WJ–R Calculation subtest, but the effect was positive (effect size 0.30) and large enough to be considered substantively important under WWC criteria. → What Works Clearinghouse 2010

Evidence¶

What Works Clearinghouse 2010¶

What Works Clearinghouse, U.S. Department of Education. (2010). What Works Clearinghouse Intervention Report: Lindamood Phoneme Sequencing® (LiPS®). Students with Learning Disabilities. https://ies.ed.gov/ncee/wwc/InterventionReport/279

q3 · i1 · causal · r2

Posttest math finding from the Torgesen et al. (2001) RCT (n = 50), as tabulated in the report's math appendix. The printed effect size of 0.30 on the Calculation subtest (mean difference 4.0, improvement index +12) was not statistically significant but exceeded the 0.25 substantively-important threshold; the report states "the effect on the Calculation subtest was positive and large enough to be considered substantively important".

"WJ–R Calculation subtest Grade 4 50 90.9 (14.1) 86.9 (11.5) 4.0 0.30 ns +12 Domain average for math 0.30 ns +12"

Discussion¶

Related Claims¶

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