Any single measure type approximates the composite (.89, .87, .85) but has only limited value used alone¶
Claim · All claims
Evidence · 1 study · associationalr1·q2·i3large
Currency · newest study 1921 · 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.
q2 i3 An individual examination, two group tests, or two teachers' estimates each correlated highly with the composite (.89, .87, .85), but because the measures are contained within the composite, any one used singly reduces variability only about one-half and has limited value. → Chassell 1921
Evidence¶
Chassell 1921¶
Chassell, C. F., & Chassell, L. M. (1921). A survey of the three first grades of the Horace Mann School by means of psychological tests and teachers' estimates, and a statistical evaluation of the methods employed. Part II. The Journal of Educational Psychology, 12(5), 243-252. https://doi.org/10.1037/h0068285
q2 · i3 · associational · r1
Correlational comparison of each measure type with the composite of all measures, based on 60, 30, and 60 cases respectively; the printed correlations with the composite are r = .89, r = .87, and r = .85, all large effects. The article cautions the measures "are not independent, but are already contained within the composite itself", inflating these correlations.
"any one of the three types of measures which were used in the survey, that is, an individual examination or two group tests or two teachers' estimates, would approximate the same results for classification and promotion as the composite itself."
Discussion¶
Related Claims¶
- Group tests combined with teachers' estimates correlate .77 with the Stanford Revision, questioning the necessity of individual examination — related
- Combinations of two measure types correlate very highly with the composite (.96, .91, .98), with little difference between choices — related
- Teachers' estimates show the highest single-measure correlation with the Stanford Revision (.72, 60 cases) — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
single-measure-types-approximate-composite-limited-value |
title |
Any single measure type approximates the composite (.89, .87, .85) but has only limited value used alone |
description |
Any single measure type approximates the composite (.89, .87, .85) but has only limited value used alone |
status |
review |
evidence_strength |
weak |
newest_evidence |
1921 |
generated |
by process:wiki-ingest on 2026-10-24 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — chassell-1921 |
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