<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Friends,<div class=""><br class=""></div><div class="">I recently spent a few semesters as a visiting professor teaching an undergraduate course in perception. To supplement the lectures I created a few interactive demonstrations. In the hope that they might be useful to others, I have placed these at <font color="#0069d9" class=""><u class=""><a href="http://visionscience.com/perceptiondemos/" class="">http://visionscience.com/perceptiondemos/</a></u></font><span class="" style="color: rgb(0, 105, 217);"> .</span></div><div class=""><br class=""></div><div class="">Comments, questions, and feature requests are welcome.</div><div class=""><br class=""></div><div class="">Best,</div><div class="">Andrew Watson</div><div class=""><br class=""></div></body></html>