An alternative to t-tests, producing posterior estimates for group means and standard deviations and their differences and effect sizes. It implements the method of Kruschke (2013) Bayesian estimation supersedes the t test. Journal of Experimental Psychology: General, 142(2):573-603
CHANGES in v.0.5.1 (2018-04-19)
Fixed issue with position of text on density plots.
plotAll and plotPostPred modified to show the data with an 'ordinary' histogram.
Warning if adaptation is not adequate (instead of "NOTE: Stopping adaptation").
CHANGES in v.0.5.0 (2017-05-28)
'BESTmcmc' uses 'rjags' directly, instead of 'jagsUI' wrappers. This resolves 'set.seed' issues, but values returned will not be the same as with previous versions.
Function 'hdi' removed; imports HDInterval::hdi instead.
CHANGES in v.0.4.0 (2015-12-28)
BESTmcmc now allows normality parameter, nu < 1 (See John Kruschke's blog post 2 Dec 2015).
Vignette updated to use new prior specification.
CHANGES in v.0.3.0 (2015-06-29)
BESTmcmc 'showPriors' argument changed to 'doPriorsOnly'.
Function postPriorOverlap added.
CHANGES in v.0.2.6 (2015-05-09)
BESTmcmc gains a 'showPriors' argument.
Removed constraints on small samples in BESTmcmc (n=1 is ok if priors are specified).
makeData throws an error if the number of outliers is 1.
CHANGES in v.0.2.5 (2015-05-07)
CHANGES in v.0.2.4 (2015-05-03)
CHANGES in v.0.2.3 (2014-11-17)
CHANGES in v.0.2.2 (2014-06-06)
hdi gains a density method, which can handle discontinuous HDIs. This is used for the posterior density plots when showCurve = TRUE.
Enhancements to plots: o credMass = NULL suppresses plotting of the credible interval. o plotPost, the plot.BEST method, and plotAreaInROPE now make full use of the ... argument for additional graphical parameters. o default xlim for posterior density plots is now based on 99% HDI (not range). o plotPost and plot.BEST return an object of class 'histogram' invisibly. o plotPost deals properly with a vector of integers.
CHANGES in v.0.2.0 (2013-08-23)
Added function plotAreaInROPE.
In BESTpower, call to x11() (which is platform specific) changed to dev.new(); in Rstudio, the plot is shown on active device.
BESTmcmc and BESTpower gain 'rnd.seed' arguments for reproducible output; testthat test files for BESTmcmc and BESTpower added.
makeData gains a showPlot argument.
Fixed bug in plot.BEST: the ... argument was not being passed to plotPost.
BESTmcmc has 'verbose' argument; setting verbose = FALSE (or 0) suppresses output to the Console (wish of Ben Marwick).
BESTpower also has 'verbose' argument; here verbose = 0 (or FALSE) suppresses all output, verbose = 1 (or TRUE) provides just a progress bar; verbose = 2 (the default) displays full details.