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-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) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
668106.pdf | 327.87 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License