Percentile-based and percentage-of-failure evaluations of stimulus-word difficulty agree almost perfectly (rank r = .996)¶
Claim · All claims
Evidence · 1 study · associationalr1·q2·i3large
Currency · newest study 1918 · 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 Ranking the 80 stimulus words by percentage of failure versus by percentile values derived from the probability curve yields a rank correlation of r = .996. → Harry A. Greene 1918
Evidence¶
Harry A. Greene 1918¶
Harry A. Greene. (1918). A Standardization of Certain Opposites Tests. The Journal of Educational Psychology. https://doi.org/10.1037/h0070589
q2 · i3 · associational · r1
A method-comparison analysis in this standardization study, in which both evaluation procedures were carried through for comparison. The article reports the printed effect size r = .996 as "almost perfect, "r" being equal to .996".
"The actual rank correlation between the results of the methods was almost perfect, "r" being equal to .996."
Discussion¶
Related Claims¶
- Earlier opposites-test scoring methods ignored differences in stimulus-word difficulty, penalizing all errors equally — related
- Response frequencies to stimulus words vary widely, with easy words answered correctly by most subjects and hard words such as suave missed by 96% — related
- The Organization Test exercises were scaled on 1634 children in grades three to eight, yielding difficulty values from .03 to 6.4 units — related
- Galton's ogive percentile graph serves as a convenient scale that lets an individual's test score be instantly translated into a rank within the normed group — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
opposites-word-difficulty-methods-rank-r-996 |
title |
Percentile-based and percentage-of-failure evaluations of stimulus-word difficulty agree almost perfectly (rank r = .996) |
description |
Percentile-based and percentage-of-failure evaluations of stimulus-word difficulty agree almost perfectly (rank r = .996) |
status |
review |
evidence_strength |
moderate |
newest_evidence |
1918 |
generated |
by process:wiki-ingest on 2026-10-25 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — harry-a-greene-1918 |
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