Claims

SpellRead™ has potentially positive effects on reading comprehension, with an average improvement index of +20 percentile points

Claim · All claims
Evidence · 1 study · quant-synthesis r1 · q3
Currency · newest study 2007 · 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? Across the two studies, SpellRead™ showed potentially positive effects on comprehension, with improvement indices from +1 to +37 percentile points. → What Works Clearinghouse 2007

Evidence

What Works Clearinghouse 2007

What Works Clearinghouse, U.S. Department of Education. (2007). WWC Intervention Report: SpellRead™. https://ies.ed.gov/ncee/wwc

q3 · i? · quant-synthesis · r1

WWC synthesis of comprehension outcomes in the two RCTs (WRMT–R and GRADE passage comprehension in Torgesen et al.; WDRB and GORT-3 comprehension in Rashotte et al.). The average improvement index was "+20 percentile points across the two studies", rated potentially positive.

"The average improvement index for comprehension is +20 percentile points across the two studies"

Discussion

Page metadata
Field Value
type claim
id spellread-comprehension-index-twenty
title SpellRead™ has potentially positive effects on reading comprehension, with an average improvement index of +20 percentile points
description SpellRead™ has potentially positive effects on reading comprehension, with an average improvement index of +20 percentile points
status review
evidence_strength moderate
newest_evidence 2007
generated by process:wiki-ingest on 2026-10-07
trust unverified — no one has confirmed this page's content
sources 1 — what-works-clearinghouse-2007

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