1. Mem. ASME Department of Engineering Education, Virginia Polytechnic Institute and State University, 635 Prices Fork Road, Blacksburg, VA 24061 e-mail:
2. Professor School of Psychological Sciences, Purdue University, 703 Third Street, West Lafayette, IN 47907 e-mail:
3. Professor Department of Engineering Education, Ohio State University, 2070 Neil Avenue, Columbus, OH 43210 e-mail: