Related Experiment Video
Updated: Aug 18, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
Published on: March 1, 2022
GEE analysis of negatively correlated binary responses: a caution
J A Hanley1, A Negassa, M D Edwardes
1Department of Epidemiology and Biostatistics, McGill University, Montreal, Canada. Jimh@epid.lan.mcgill.ca
Abstract:
The method of generalized estimating equations has become almost standard for analysing longitudinal and other correlated response data. However, we have found that if binary responses have less than binomial variation over clusters, and are modelled using exchangeable correlations, prevailing software implementations may give unreliable results. Bounding the negative correlation away from its theoretical minimum may not always be a satisfactory solution. In such instances, using the independence working correlation structure and robust SEs is a more trustworthy alternative.
Related Concept Videos
Correlation and Causation
Correlations
Correlation
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:
Spearman's Rank Correlation Test
Spearman's test calculates correlation by...
Sign Test for Matched Pairs
To conduct the sign test, we first calculate the differences in value between...
Friedman Two-way Analysis of Variance by Ranks
