ITBS and ISAT scores are highly correlated among CPS students in reading (r = 0.83 to 0.85) and mathematics (r = 0.86 to 0.87)¶
Claim · All claims
Evidence · 1 study · associationalr2·q2·i3large
Currency · newest study 2003 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2006: 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 i3 Scores on the two tests are highly correlated in grades three, five, and eight in both subjects, with printed correlations of r = 0.83 to 0.87, rising to around 0.90 when corrected for unreliability. → Easton 2003
Evidence¶
Easton 2003¶
Easton, J. Q., Correa, M., Luppescu, S., Park, H.-S., Ponisciak, S., Rosenkranz, T., & Sporte, S. (2003). How Do They Compare? ITBS and ISAT Reading and Mathematics in the Chicago Public Schools, 1999 to 2002. Consortium on Chicago School Research. https://www.consortium-chicago.org/publications/briefs/onlineresources.html
q2 · i3 · associational · r2
Analysis of the 2002 CPS spring administrations linking student scores on both tests in grades three, five, and eight, using students with complete scores on both tests regardless of public reporting status. The printed correlation coefficients include r = 0.83, 0.85, and 0.85 in reading and r = 0.86, 0.87, and 0.86 in mathematics, all large correlations; the article reports they rise to around 0.90 when corrected for unreliability.
"In reading, the correlations for grades three, five, and eight are 0.83, 0.85, and 0.85, respectively. In mathematics, the correlations are slightly higher at 0.86, 0.87, and 0.86."
Discussion¶
Related Claims¶
- In fifth-grade mathematics, ITBS scores declined while ISAT scores rose, a statistically significant difference in opposing trends — related
- In fifth-grade reading, ITBS scores declined significantly more than ISAT scores from 1999 to 2002 — related
- ITBS mathematics is heavily weighted toward computation while ISAT contains up to three times as many items on algebra, geometry, measurement, and probability and statistics — related
- ISAT cut scores differ by grade and subject, with eighth-grade mathematics requiring a high score and eighth-grade reading a relatively low one to meet standards — related
- One-to-one correspondence between ITBS national quartiles and ISAT performance categories breaks down at the first and fourth quartiles — related
- ITBS and ISAT inclusion rules differ: ISAT reports scores for all test-takers, while about 20 percent of ITBS test-takers are excluded from public reporting — related
- PSAE component-test scores are highly correlated within and across subjects, with ACT science and ISBE science correlating at r = 0.74 in 2004 — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
itbs-isat-highly-correlated-cps |
title |
ITBS and ISAT scores are highly correlated among CPS students in reading (r = 0.83 to 0.85) and mathematics (r = 0.86 to 0.87) |
description |
ITBS and ISAT scores are highly correlated among CPS students in reading (r = 0.83 to 0.85) and mathematics (r = 0.86 to 0.87) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2003 |
recheck_by |
2006 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — easton-2003 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.