Intelligence-test scores overlap substantially across non-consecutive grades, with some fourth graders scoring above the fifth-grade norm¶
Claim · All claims
Evidence · 1 study · associationalr2·q2
Currency · newest study 1917 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
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q2 i? Considerable overlapping of ability exists between the fourth, sixth, and eighth grades on the point scale, with 8 of 43 fourth graders scoring above the fifth-grade norm. → Arthur S. Otis 1917
Evidence¶
Arthur S. Otis 1917¶
Arthur S. Otis. (1917). An Absolute Point Scale for the Group Measurement of Intelligence.—Part II. The Journal of Educational Psychology. https://doi.org/10.1037/h0074753
q2 · i? · associational · r2
Analysis of point-scale score distributions for pupils in the fourth (43), sixth (40), and eighth (38) grades, plotted in Fig. 1 and Table VI. The author reports "considerable overlapping between the grades even though they are not consecutive," with average scores of 385, 514, and 605 respectively.
"It will be noted that there is considerable overlapping between the grades even though they are not consecutive."
Discussion¶
Related Claims¶
- Grades overlap massively in spelling: on average 20.8% of pupils reach or exceed the median of the next grade above — a broader claim this one bears on
- Total point score correlates with teachers' school marks at .80, .41, and .50 in the fourth, sixth, and eighth grades, and brightness coefficients rise with amount of schooling — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
grade-overlapping-of-point-scale-scores |
title |
Intelligence-test scores overlap substantially across non-consecutive grades, with some fourth graders scoring above the fifth-grade norm |
description |
Intelligence-test scores overlap substantially across non-consecutive grades, with some fourth graders scoring above the fifth-grade norm |
status |
review |
evidence_strength |
moderate |
newest_evidence |
1917 |
generated |
by process:wiki-ingest on 2026-10-24 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — arthur-s-otis-1917 |
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