The presenter, Kyle Peck of Penn State, said he would put the entire presentation the web. Could not get in there tonight, but links to all of the researach are, we were told, there as well. The Effect of Technology on Student Achievement.
Students usually learn more in classes in which they receive computer based instruction.
The amount varies according to design, content, motivation, etc. True over hundreds of studies. Their attitudes actually improve. If students use computers for learning, they lose their positive attitude toward computers. If students use computers for learning, they gain interest in the subjects they are studying.