Correlations between Alpha and grades vary by class standing, lowest for graduates (r = .15) and highest for seniors (r = .38)¶
Claim · All claims
Evidence · 1 study · associationalr2·q3·i1small
Currency · newest study 1920 · 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 i1 Group correlations were r = .15 for 36 graduates, .38 and .35 for two samples of 100 seniors, and .29 for 100 juniors and 100 sophomores. → Bridges 1920
Evidence¶
Bridges 1920¶
Bridges, J. W. (1920). The correlation between college grades and the Alpha intelligence tests. The Journal of Educational Psychology, 11(7), 361-369. https://doi.org/10.1037/h0071462
q3 · i1 · associational · r2
Product-moment correlations computed separately for five class-standing groups from the 436-case sample; the printed effect sizes include r = .15 for graduates and r = .38 for the first senior sample.
"Thirty-six graduates, .15; first sample of one hundred seniors, .38; second sample of one hundred seniors, .35; one hundred juniors, .29; one hundred sophomores, .29."
Discussion¶
Related Claims¶
- Alpha predicts academic standing better in Agriculture (r = .54) than in Arts or Engineering, and subtest patterns vary by college — related
- Army Alpha intelligence standing correlates r = +.31 with one-term school standing among 153 normal-school students — related
- IQ-grade correlation differs sharply by class standing: .69 for Juniors versus .17 for Sophomores, rising to .48 when three discrepant records are omitted — related
- Stanford Adult test results correlate .44 with college grades when Juniors and Sophomores are re-ranked as one group — related
- Alpha subtests differ in predicting grades, with correlations from .17 (Test 3) to .37 (Test 7) among seniors — related
- Median Alpha scores increase each year of high school, by about 15, 10 and 4 points across the successive year intervals — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
alpha-grades-correlation-class-standing |
title |
Correlations between Alpha and grades vary by class standing, lowest for graduates (r = .15) and highest for seniors (r = .38) |
description |
Correlations between Alpha and grades vary by class standing, lowest for graduates (r = .15) and highest for seniors (r = .38) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
1920 |
generated |
by process:wiki-ingest on 2026-10-24 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — bridges-1920 |
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