Text this: A comprehensive guide to intellectual and developmental disabilities / edited by Michael L. Wehmeyer, Ph. D., University of Kansas, Ivan Brown, Ph. D., Brock University, Maire Percy, Ph. D., University of Toronto, Surrey Place Centre, Toronto, Karrie A. Shogren, Ph. D., University of Kansas, and Wai Lun Alan Fung, M.D., Sc. D., University of Toronto.