For pupils entitled to free school meals, Butterfly Phonics showed no statistically significant effects on any outcome (NGRT g = 0.16, SWRT g = 0.42, PhAB g = 0.18)¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2015 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? Subgroup analysis for pupils entitled to free school meals found no statistically significant intervention effects, with effect sizes of 0.16 (-0.18, 0.49) for NGRT, 0.42 (-0.06, 0.91) for SWRT, and 0.18 (-0.14, 0.51) for PhAB. → Christine Merrell 2015
Evidence¶
Christine Merrell 2015¶
Christine Merrell, Adetayo Kasim. (2015). Butterfly Phonics: Evaluation Report and Executive Summary. Education Endowment Foundation. https://eric.ed.gov/?id=ED581118
q3 · i? · causal · r2
Subgroup analysis of the randomised controlled trial restricted to pupils entitled to free school meals, analysed with multilevel models accounting for school effects (Table 10). The evaluators suggest the smaller FSM sample may account for the non-significance.
"There were no statistically significant intervention effects, with effect sizes of 0.16 (-0.18, 0.49) for the NGRT, 0.42 (-0.06, 0.91) for the SWRT, and 0.18 (-0.14, 0.51) for the PhAB scores."
Discussion¶
Learner Variables¶
- Socioeconomic Status — moderator: an instructional effect differs by group
Related Claims¶
- Butterfly Phonics showed positive but non-statistically-significant effects on secondary outcome measures of single word reading (g = 0.38) and non-word reading (g = 0.23) — related
- EdTech effects for disadvantaged pupils are smaller and inconsistent: no significant impact in disadvantaged-focused subgroups (d = 0.0527) and a smaller significant effect in partial-subset studies (d = 0.1624) — a broader claim this one bears on
- Butterfly Phonics improved reading comprehension of struggling Year 7 readers more than business-as-usual, with an effect size of 0.43 equivalent to five months' progress, but the effect was below the trial's minimum detectable effect size — related
- The TextNow programme showed a differential effect by free school meal eligibility: a small non-significant positive effect for FSM-eligible pupils and a significant negative effect for non-FSM pupils — related
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