Archive for September, 2014

September 26, 2014

MERpsychophysics.0

This is the old version of the package, compatible with lme4.0. It is possible to estimate the PSE and JND of a GLMM with having single, fixed-effed categolical predictor. The estimate is performed either via delta method or with a parametric bootstrap. The function for the parametric bootstrap (MERboot) samples the random predictor from a univariate or bivariate normal distribution using the package mnorm. The algorithms are described in Moscatelli et al. (2012).

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September 26, 2014

MERpsychophysics1.1

This package version is compatible with lme4.1. It allows the estimate of PSE and JND via delta method or bootstrap. The current bootstrap function is based on bootMer{lme4.1}. The algorithm is similar to my previous function MERboot{MERpsychophysics.0}, which is referenced in Moscatelli et al. (2012).

GLMMplot can be used for plotting, while the analougus function MERplot is not ready yet. The user manual is forthcoming – for now, see the MERdemo.R file for help.