This page links to an interactive demonstration of the QUEST+ psychometric procedure, for use with the article:

Watson, A. B. (2017). QUEST+: A general multidimensional Bayesian adaptive psychometric method. Journal of Vision, 17(3):10, 1–27, doi:10.1167/17.3.10.

To run the demo, first download the free Wolfram CDF Player (if you have not previously done so). Then download and run the demo file QuestPlusDemo.cdf.

A Mathematica Notebook that implements the QUEST+ procedure is available at QuestPlus.nb.