R.M. Hodapp, Behavioral Phenotypes: Going Beyond the Two-Group Approach.R.E. Arendt, J.S. Noland, E.J. Short, and L.T. Singer, Prenatal Drug Exposure and Mental Retardation.J.M. Fletcher, H. Northrup, S.H. Landry, L.A. Kramer, M.E. Brandt, M. Dennis, M.A. Barnes, S.E. Blaser, H.J. Hannay, K. Copeland, and D.J. Francis, Spina Bifida: Genes, Brain, and Development.H.C. Cromwell and B.H. King, The Role of the Basal Ganglia in the Expression of Stereotyped, Self-Injurious Behaviors in Developmental Disorders.L. Ward, Risk Factors for Alzheimer's Disease in Down Syndrome.J.G. Borkowski, J.J. Lounds, C.W. Noria, J.B. Lefever, K. Weed, D.A. Keogh, and T.L. Whitman, Precursers of Mild Mental Retardation in Children with Adolescent Mothers.A.A. Scarborough and K.K. Poon, The Ecological Context of Challenging Behavior in Young Children with Developmental Disabilities.K. Smith, L. Webber, J. Graffam, and C. Wilson, Employment and Intellectual Disability: Achieving Successful Employment Outcomes.M.L. Wehmeyer, S.J. Smith, S.B. Palmer, D.K. Davies, and S.E. Stock, Technology Use and People with Mental Retardation.