Welcome to my homepage! Although it would be much more enjoyable to sit down and talk about our mutual interests, no one's yet been able to figure out how to pour a cup of coffee in cyberspace. I hope that - by moving around this page - you can find what you're looking for. Click on about for a brief biographical statement, information on my educational background, and my professional history. Click on research to read a general statement about my research interests. Click on teaching and mentoring to find a list of courses I teach at Georgetown as well as a list of doctoral students I've mentored. Click on publications to find a list of selected publications. Click on consulting for a brief description of my work as consultant in the area of medical discourse. And if, after doing all of that, you have questions or comments for me, clicking on contacts will take you to my snail mail and email addresses.