Volume 31 of the "International Review of Research in Mental Retardation" is a thematic exploration of personality and motivation in persons with mental retardation. Looking at a broad spectrum of intellectual disabilities, "Mental Retardation, Personality, and Motivational Systems" explores motivation as a moderator for performance and individualized effort. Coverage includes discussions of intrinsic and extrinsic motivation in both mentally retarded and non-retarded children, self-determination, interpersonal decision making in adolescents and adults with mental retardation, interpersonal relationships, and the connection between etiological-specific differences and motivation to form 'behavioral phenotypes.' A final chapter presents a transactional perspective on human ability, relying on constructs of intelligence, cognitive processes, and motivation, with implications for developmental interventions in the lives of persons with mental retardation. This book explores personality and motivation in persons with mental retardation. It discusses intrinsic and extrinsic motivation in both mentally retarded and non-retarded children. It is a useful reference for researchers and scholars in developmental and cognitive psychology, as well as neuropsychology.