Claims

Four methods of identifying individual change each duplicated group-based effect sizes, with the reliable change index and growth curve approaches showing stronger consistency and predictive power (Frijters et al.)

Claim · All claims
Evidence · 1 study · review r2 · q2
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2016: tool and model accuracy changes quickly

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.

q2 i? Each of four change metrics (normalization, Jacobson-Truax index, HLM growth rates, fixed criterion) duplicated traditional group-based effect sizes; the reliable change index and growth curve approaches showed stronger consistency and predictive power. → Mary Beth Calhoon 2013

Evidence

Mary Beth Calhoon 2013

Mary Beth Calhoon, Hollis S. Scarborough, Brett Miller. (2013). Interventions for struggling adolescent and adult readers: instructional, learner, and situational differences. Read Writ 26:489–494. https://doi.org/10.1007/s11145-013-9442-7

q2 · i? · review · r2

The editorial summarizes Frijters, Morris, Sevcik, and Lovett's analysis of PHAST Reading intervention outcome data, in which individual change was characterized with four methods and compared for utility; "the reliable change index and growth curve approaches showing stronger consistency and predictive power".

"Results indicate that each method duplicated traditional group-based effect sizes, with the reliable change index and growth curve approaches showing stronger consistency and predictive power."

Discussion

Page metadata
Field Value
type claim
id four-change-metrics-reliable-change-and-growth-curve-stronger
title Four methods of identifying individual change each duplicated group-based effect sizes, with the reliable change index and growth curve approaches showing stronger consistency and predictive power (Frijters et al.)
description Four methods of identifying individual change each duplicated group-based effect sizes, with the reliable change index and growth curve approaches showing stronger consistency and predictive power (Frijters et al.)
status review
evidence_strength moderate
newest_evidence 2013
recheck_by 2016
generated by process:wiki-ingest on 2026-10-17
trust unverified — no one has confirmed this page's content
sources 1 — mary-beth-calhoon-2013

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