Will asks, > Are you running a quantatative or qualative experiment? The work I'm doing is a large component of my dissertation and actually includes a series of experiments and theoretical work. The next experiment is a little of both. We'll probably video tape folks using our tool for usability analysis, but take some quantitative measures to make our statistical analysis easier, I suspect. Some of the previous experiments use some pretty new theoretical techniques which are somewhat difficult to classify, and are based on trying to measure a human's comprehension of audio, which is somewhat tricky. Some of this is published, although I'm waiting to publish some of the major experiments until my dissertation is finished. I can email you one of the latest papers if you want, or if you have IEEE access, it was presented at ICPC 2007 this year. Andreas __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind