Package: fddm
Type: Package
Title: Fast Implementation of the Diffusion Decision Model
Version: 1.0-2
Authors@R: c(person(given="Kendal B.", family="Foster", role=c("aut")),
             person(given="Henrik", family="Singmann", role=c("ctb", "cre"),
             email="singmann@gmail.com", comment=c(ORCID="0000-0002-4842-3657")),
             person(given = "Achim", family = "Zeileis", role = "ctb", 
             comment = "methods partially taken from betareg"))
Description: Provides the probability density function (PDF),
        cumulative distribution function (CDF), the first-order and
        second-order partial derivatives of the PDF, and a fitting
        function for the diffusion decision model (DDM; e.g., Ratcliff
        & McKoon, 2008, <doi:10.1162/neco.2008.12-06-420>) with
        across-trial variability in the drift rate. Because the PDF,
        its partial derivatives, and the CDF of the DDM both contain an
        infinite sum, they need to be approximated. 'fddm' implements
        all published approximations (Navarro & Fuss, 2009,
        <doi:10.1016/j.jmp.2009.02.003>; Gondan, Blurton, &
        Kesselmeier, 2014, <doi:10.1016/j.jmp.2014.05.002>; Blurton,
        Kesselmeier, & Gondan, 2017, <doi:10.1016/j.jmp.2016.11.003>;
        Hartmann & Klauer, 2021, <doi:10.1016/j.jmp.2021.102550>) plus
        new approximations. All approximations are implemented purely
        in 'C++' providing faster speed than existing packages.
License: GPL (>= 2)
Imports: Rcpp (>= 1.0.1), stats, methods, Formula
LinkingTo: Rcpp, RcppEigen
Depends: R (>= 3.5.0)
Suggests: rtdists, RWiener, ggplot2, reshape2, testthat, knitr,
        rmarkdown, microbenchmark, ggnewscale, ggforce, WienR, emmeans,
        estimability, lmtest, numDeriv
URL: https://github.com/rtdists/fddm
BugReports: https://github.com/rtdists/fddm/issues
RoxygenNote: 7.3.1
Roxygen: list(markdown = TRUE)
Encoding: UTF-8
VignetteBuilder: knitr
Repository: https://rtdists.r-universe.dev
Date/Publication: 2024-08-01 21:00:09 UTC
RemoteUrl: https://github.com/rtdists/fddm
RemoteRef: HEAD
RemoteSha: 7780857f2e0d2a0607938eb2ce05dd1d1cd3b404
NeedsCompilation: yes
Packaged: 2026-07-04 00:15:07 UTC; root
Author: Kendal B. Foster [aut],
  Henrik Singmann [ctb, cre] (ORCID:
    <https://orcid.org/0000-0002-4842-3657>),
  Achim Zeileis [ctb] (methods partially taken from betareg)
Maintainer: Henrik Singmann <singmann@gmail.com>