After leading a PIE at NITOP 2010 on text messaging during class, I incorporated a new demonstration into my Cognitive Processes course. In this exercise, students either text message each other during lecture or they listen to the lecture without the distraction of text messaging. Everyone then takes a quiz on the material. Results suggest that text message during lecture leads to impaired comprehension of material.
Amanda C. Gingerich. "IDK LOL: Text messaging during class impairs comprehension of lecture material" 33rd Annual Conference of the National Institute on the Teaching of Psychology. St. Pete Beach, FL.. Jan. 2011.