Higham & Higham (2019)

New improved gamma: Enhancing the accuracy of Goodman–Kruskal’s gamma using ROC curves

Behavior Research Methods, 51(1), 108-125

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Higham, P. A., & Higham, D. P. (2019). New improved gamma: Enhancing the accuracy of Goodman–Kruskal’s gamma using ROC curves. Behavior Research Methods, 51(1), 108-125. https://doi.org/10.3758/s13428-018-1125-5

What Rests on This

1 mechanism cites this source. Each finding below is quoted as it appears on that mechanism's own page.

Feeling of Knowing Metacognition

Measured in humans

Gamma equals twice the area under the ROC curve minus one (the area being the probability that a correct item gets a higher rating than an incorrect one); the usual formula for gamma drops tied ratings and so runs further from zero than this ROC-based value, and the authors recommend the ROC version