Random Effects Multinomial Processing Tree Models: A Maximum Likelihood Approach

Steffen Nestler () and Edgar Erdfelder ()
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Steffen Nestler: Universität Münster
Edgar Erdfelder: Universität Mannheim

Psychometrika, 2023, vol. 88, issue 3, No 5, 809-829

Abstract: Abstract The present article proposes and evaluates marginal maximum likelihood (ML) estimation methods for hierarchical multinomial processing tree (MPT) models with random and fixed effects. We assume that an identifiable MPT model with S parameters holds for each participant. Of these S parameters, R parameters are assumed to vary randomly between participants, and the remaining $$S-R$$ S - R parameters are assumed to be fixed. We also propose an extended version of the model that includes effects of covariates on MPT model parameters. Because the likelihood functions of both versions of the model are too complex to be tractable, we propose three numerical methods to approximate the integrals that occur in the likelihood function, namely, the Laplace approximation (LA), adaptive Gauss–Hermite quadrature (AGHQ), and Quasi Monte Carlo (QMC) integration. We compare these three methods in a simulation study and show that AGHQ performs well in terms of both bias and coverage rate. QMC also performs well but the number of responses per participant must be sufficiently large. In contrast, LA fails quite often due to undefined standard errors. We also suggest ML-based methods to test the goodness of fit and to compare models taking model complexity into account. The article closes with an illustrative empirical application and an outlook on possible extensions and future applications of the proposed ML approach.

Keywords: multinomial processing tree models; random effects models; hierarchical models; maximum likelihood estimation (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11336-023-09921-w

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