ERIC Number: EJ856005
Record Type: Journal
Publication Date: 2009-Sep
Abstractor: As Provided
Reference Count: 0
Why Are Experts Correlated? Decomposing Correlations between Judges
Broomell, Stephen B.; Budescu, David V.
Psychometrika, v74 n3 p531-553 Sep 2009
We derive an analytic model of the inter-judge correlation as a function of five underlying parameters. Inter-cue correlation and the number of cues capture our assumptions about the environment, while differentiations between cues, the weights attached to the cues, and (un)reliability describe assumptions about the judges. We study the relative importance of, and interrelations between these five factors with respect to inter-judge correlation. Results highlight the centrality of the inter-cue correlation. We test the model's predictions with empirical data and illustrate its relevance. For example, we show that, typically, additional judges increase efficacy at a greater rate than additional cues.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A