Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/116040
Title: quickpsy: An R Package to Fit Psychometric Functions for Multiple Groups
Author: Linares, Daniel
López i Moliner, Joan
Keywords: R (Llenguatge de programació)
Psicometria
R (Computer program language)
Psychometrics
Issue Date: Aug-2016
Publisher: The R Foundation
Abstract: quickpsy is a package to parametrically fit psychometric functions. In comparison with previous R packages, quickpsy was built to easily fit and plot data for multiple groups. Here, we describe the standard parametric model used to fit psychometric functions and the standard estimation of its parameters using maximum likelihood. We also provide examples of usage of quickpsy, including how allowing the lapse rate to vary can sometimes eliminate the bias in parameter estimation, but not in general. Finally, we describe some implementation details, such as how to avoid the problems associated to round-off errors in the maximisation of the likelihood or the use of closures and non-standard evaluation functions
Note: Reproducció del document publicat a: https://journal.r-project.org/archive/2016/RJ-2016-008/index.html
It is part of: The R Journal, 2016, vol. 8, num. 1, p. 122-131
URI: http://hdl.handle.net/2445/116040
ISSN: 2073-4859
Appears in Collections:Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)

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