ITBS test form progression systematically influences eighth-grade math gain scores, with Form L-to-M years showing the largest gains and Form K-to-L years the smallest¶
Claim · All claims
Evidence · 1 study · associationalr2·q2
Currency · newest study 2002 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2005: 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? The two largest eighth-grade math gains (1997 and 1999) share the Form L to Form M progression and the three lowest gains (1994, 1996, and 2001) share the Form K to Form L progression, a pattern the authors say is consistent with test form effects. → Todd Rosenkranz 2002
Evidence¶
Todd Rosenkranz 2002¶
Todd Rosenkranz. (2002). 2001 CPS Test Trend Review: Iowa Tests of Basic Skills. Consortium on Chicago School Research. https://consortium.uchicago.edu/publications/2001-cps-trend-review-iowa-tests-basic-skills
q2 · i? · associational · r2
Observational analysis of eighth-grade math gain scores by test-form transition, 1994-2001, reported in the gain-trends discussion and Figure 4. Comparing only same form-to-form transitions is offered as a control for form difficulty differences.
"the two largest gains (1997 and 1999) both happen to have the same form progression (Form L to Form M); and the three lowest gains (1994, 1996, and 2001) all share the same form progression as well (Form K to Form L). This pattern is consistent with test form effects."
Discussion¶
Related Claims¶
- CPS academic productivity gains peaked in 1997, with 1999 gains uniformly lower than 1997 gains at all grades — related
- CPS learning gains were consistently higher in all grades in 1996 than in 1994, but 1999 gains declined slightly relative to 1997 in all grades except third, suggesting productivity gains may have peaked — related
- CPS elementary school productivity improvements stalled after 1997, with no evidence of significant productivity growth since then — related
- Third grade is the notable exception where retained students did not make smaller gains, likely due to the ITBS Level 8 to Level 9 test format change — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
itbs-test-form-effects-on-eighth-grade-math-gains |
title |
ITBS test form progression systematically influences eighth-grade math gain scores, with Form L-to-M years showing the largest gains and Form K-to-L years the smallest |
description |
ITBS test form progression systematically influences eighth-grade math gain scores, with Form L-to-M years showing the largest gains and Form K-to-L years the smallest |
status |
review |
evidence_strength |
weak |
newest_evidence |
2002 |
recheck_by |
2005 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — todd-rosenkranz-2002 |
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