quickpsy: An R Package to Fit Psychometric Functions for Multiple Groups

View Researcher's Other Codes

Disclaimer: The provided code links for this paper are external links. Science Nest has no responsibility for the accuracy, legality or content of these links. Also, by downloading this code(s), you agree to comply with the terms of use as set out by the author(s) of the code(s).

Authors Daniel Linares, Joan López-Moliner
Journal/Conference Name The R Journal
Paper Category
Paper Abstract quickpsy is a package to parametrically fit psychometric functions. In comparison with previous R packages, quickpsy was build 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.
Date of publication 2016
Code Programming Language R
Comment

Copyright Researcher 2021