<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Colleagues,</div><div class=""><br class=""></div>I recently published a paper describing a new adaptive psychometric procedure QUEST+ that overcomes many shortcomings of previously described procedures, including the original QUEST. <div class=""><br class=""></div><div class="">Watson, A. B. (2017). QUEST+: A general multidimensional Bayesian adaptive psychometric method. <i class="">Journal of Vision</i>, 17(3), 10-10, <a href="http://dx.doi.org/10.1167/17.3.10" class="">http://dx.doi.org/10.1167/17.3.10</a>.<br class=""><br class=""><div class="">With this new method you can:</div><div class=""><div class=""><ul class=""><li class="">Use an arbitrary number of stimulus dimensions (contrast, spatial frequency, orientation, color, …)</li><li class="">Use an arbitrary sampling of each stimulus dimension</li><li class="">Use an arbitrary psychometric function shape (Weibull, Normal, Step, Logistic, whatever!)</li><li class="">Use an arbitrary number of psychometric function parameters (mean, variance, guess, lapse,…)</li><li class="">Use an arbitrary number of trial outcomes (e.g. for categorical rating experiments)</li></ul></div><div class="">I am happy to report that a Matlab version of QUEST+ has now been produced by David Brainard. This code is fully compatible with PsychToolbox.</div><div class=""><br class=""></div><div class="">The code is available at</div><div class=""><br class=""></div><div class=""><span class="" style="font-family: Calibri; font-size: 14.666666984558105px; background-color: rgb(255, 255, 255);"> </span><a href="https://github.com/brainardlab/mQUESTPlus" class="" style="color: purple; font-family: Calibri; font-size: 14.666666984558105px;">https://github.com/brainardlab/mQUESTPlus</a></div><div class=""><br class=""></div><div class="">Comments on the method should go to me, comments on the code to David.</div><div class=""><br class=""></div><div class="">Enjoy!</div><div class=""><br class=""></div><div class="">-Beau</div><div class=""><br class=""></div></div></div><br class=""><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><span class="Apple-style-span" style="border-collapse: separate; font-variant-ligatures: normal; font-variant-position: normal; font-variant-numeric: normal; font-variant-alternates: normal; font-variant-east-asian: normal; line-height: normal; border-spacing: 0px;">Andrew B. Watson<div class="" style="orphans: 2; widows: 2;">Los Gatos, CA 95030</div></span></div></div></body></html>