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Model comparison and the principle of parsimony
 In
, 2015
"... At its core, the study of psychology is concerned with the discovery of plausible explanations for human behavior. For instance, one may observe that “practice makes perfect”: as people become more familiar with a task, they tend to execute it more quickly and with fewer errors. More interesting is ..."
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At its core, the study of psychology is concerned with the discovery of plausible explanations for human behavior. For instance, one may observe that “practice makes perfect”: as people become more familiar with a task, they tend to execute it more quickly and with fewer errors. More interesting is the observation that practice tends to improve
MPTinR: Analysis of multinomial processing tree models in R
, 2013
"... Abstract We introduce MPTinR, a software package developed for the analysis of multinomial processing tree (MPT) models. MPT models represent a prominent class of cognitive measurement models for categorical data with applications in a wide variety of fields. MPTinR is the first software for the an ..."
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Abstract We introduce MPTinR, a software package developed for the analysis of multinomial processing tree (MPT) models. MPT models represent a prominent class of cognitive measurement models for categorical data with applications in a wide variety of fields. MPTinR is the first software for the analysis of MPT models in the statistical programming language R, providing a modeling framework that is more flexible than standalone software packages. MPTinR also introduces important features such as (1) the ability to calculate the Fisher information approximation measure of model complexity for MPT models, (2) the ability to fit models for categorical data outside the MPT model class, such as signal detection models, (3) a function for model selection across a set of nested and nonnested candidate models (using several model selection indices), and (4) multicore fitting. MPTinR is available from the Comprehensive R Archive Network at