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Psychon Bull Rev. 2004 Feb;11(1):192-6.

AIC model selection using Akaike weights.

Author information

1
Northwestern University, Evanston, Illinois, USA. ewagenmakers@fmg.uva.nl

Abstract

The Akaike information criterion (AIC; Akaike, 1973) is a popular method for comparing the adequacy of multiple, possibly nonnested models. Current practice in cognitive psychology is to accept a single model on the basis of only the "raw" AIC values, making it difficult to unambiguously interpret the observed AIC differences in terms of a continuous measure such as probability. Here we demonstrate that AIC values can be easily transformed to so-called Akaike weights (e.g., Akaike, 1978, 1979; Bozdogan, 1987; Burnham & Anderson, 2002), which can be directly interpreted as conditional probabilities for each model. We show by example how these Akaike weights can greatly facilitate the interpretation of the results of AIC model comparison procedures.

PMID:
15117008
DOI:
10.3758/bf03206482
[Indexed for MEDLINE]

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