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Probability-curve percentile weighting of item difficulty for scoring opposites tests

Research Method · All research methods
Evidence · 1 claim (1 for) · 1 study (1 associational), q2 · 1 of 1 report an effect size · 1 claim rests on one study

Description

A scoring account in which each stimulus word's difficulty is estimated from the percentage of subjects failing it, then converted to a percentile value by reading from a table based on the area of the probability curve, assuming the tested ability fits that curve. The article states that "the percentage scores were changed directly into percentile values by reading directly from table based upon the area of the probability curve" with 0 set at -3σ, 50 at the mean, and 100 at +3σ. This replaces earlier scoring that treated every error identically. As an illustration, the word suave, "missed by 96% of the subjects", is valued at 79 on the percentile scale.

Accounts

  • Probability-curve percentile weighting of item difficulty for scoring opposites tests: A scoring account in which each stimulus word's difficulty is estimated from the percentage of subjects failing it, then converted to a percentile value by reading from a table based on the area of the probability curve, assuming the tested ability fits that curve. The article states that "the percentage scores were changed directly into percentile values by reading directly from table based upon the area of the probability curve" with 0 set at -3σ, 50 at the mean, and 100 at +3σ. This replaces earlier scoring that treated every error identically. As an illustration, the word suave, "missed by 96% of the subjects", is valued at 79 on the percentile scale. (Harry A. Greene (1918))

Claims

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Key Sources

  • Harry A. Greene. (1918). A Standardization of Certain Opposites Tests. The Journal of Educational Psychology. https://doi.org/10.1037/h0070589
Page metadata
Field Value
type research-method
id probability-curve-percentile-weighting-of-item-difficulty-for-scoring-opposites-tests
title Probability-curve percentile weighting of item difficulty for scoring opposites tests
description A scoring account in which each stimulus word's difficulty is estimated from the percentage of subjects failing it, then converted to a percentile value by reading from a table based on the area of the probability curve, assuming the tested ability fits that curve.
status review
generated by process:settle-candidates on 2026-10-25
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