1. Maricela Alarcón, is a graduate student in the Department of Psychology and a predoctoral trainee in the Institute for Behavioral Genetics, University of Colorado, Boulder. Address: Maricela Alarcon, Institute for Behavioral Genetics, Campus Box 447, University of Colorado, Boulder, CO 80309.
2. John C. DeFries, is professor of psychology and director of the Institute for Behavioral Genetics, University of Colorado, Boulder. He is director of the Colorado Learning Disabilities Research Center and serves as a consulting editor for the Journal of Learning Disabilities.
3. Jacquelyn Gillis Light, is assistant professor of psychology at Kalamazoo College, Kalamazoo, Michigan, and is an associate member of the Mac Arthur Foundation Research Network on Successful Midlife Development.
4. Bruce F. Pennington, is professor of psychology at the University of Denver. He holds both a Research Scientist Award and a MERIT award from the National Institutes of Health.