Related Experiment Video
Updated: Mar 27, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
Published on: March 1, 2022
A Measure Of Similarity Between Individuals When Scoring Directions Of Variables Are Arbitrary
Abstract:
Holley and Guilford have proposed an index, G, originally intended for use in Q type factor analysis when scoring directions are arbitrary. G is appropriate for dichotomous data only. In this paper, a general measure is derived which is identical to G in the case of dichotomous data. The measure is approximately equal to the mean inter-person covariance when all permutations of scoring directions are considered. The measure is also closely connected both with component analysis of individual differences and with the condition of proportionality between two sets of observed values.
Related Concept Videos
Variation: Normal Distribution, Range, and Standard Deviation
The Dot Product
Spearman's Rank Correlation Test
Spearman's test calculates correlation by...
Causes of Similarity-Dissimilarity Effect
Ordinal Level of Measurement
Data measured using an ordinal scale are similar to nominal scale data, but there is one major difference. The ordinal scale data can be ordered. An example of ordinal scale data is a list of the top five national parks...
Review and Preview
Percentiles are a type of fractile that partition data into...

