Claims

Removing high-scoring students lowered Test 1 and Test 3 correlations contrary to the ease hypothesis

Claim · All claims
Evidence · 1 study · associational r2 · q3
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 i? After eliminating students with percentile rankings of 75 or above, the Test 1 correlation dropped to .02 and Test 3 to .07, the reverse of what was expected. → 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 · i? · associational · r2

Correlations recomputed on 290 of the 436 cases after excluding students at or above the 75th percentile, testing the supposition that Tests 1 and 3 correlated poorly because they were too easy and not sufficiently discriminative; the printed correlations r = .02 and r = .07 are negligible.

"The results were the reverse of those expected. The correlation in the case of Test 1 dropped to .02, and in the case of Test 3 to .07."

Discussion

Page metadata
Field Value
type claim
id easy-tests-hypothesis-reversed
title Removing high-scoring students lowered Test 1 and Test 3 correlations contrary to the ease hypothesis
description Removing high-scoring students lowered Test 1 and Test 3 correlations contrary to the ease hypothesis
status review
evidence_strength weak
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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