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A better lemon squeezer? Maxium-likelihood regression with beta-distributed dependent variables

Smithson, Michael; Verkuilen, Jay


Uncorrectable skew and heteroscedasticity are among the "lemons" of psychological data, yet many important variables naturally exhibit these properties. For scales with a lower and upper bound, a suitable candidate for models is the beta distribution, which is very flexible and models skew quite well. The authors present maximum-likelihood regression models assuming that the dependent variable is conditionally beta distributed rather than Gaussian. The approach models both means (location) and...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Psychological Methods
DOI: 10.1037/1082-989X.11.1.54


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