diffIRT (1.5)

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Diffusion IRT Models for Response and Response Time Data.


Package to fit diffusion-based IRT models to response and response time data. Models are fit using marginal maximum likelihood. Parameter restrictions (fixed value and equality constraints) are possible. In addition, factor scores (person drift rate and person boundary separation) can be estimated. Model fit assessment tools are also available. The traditional diffusion model can be estimated as well.

Maintainer: Dylan Molenaar
Author(s): Dylan Molenaar

License: GPL-2

Uses: statmod

Released over 4 years ago.

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