"Personality Development in Individuals with Mental Retardation is the culmination of more than forty years of theory and research in the field of mental retardation. As a champion of the developmental approach, Edward Zigler emphasizes the importance of personality and motivational factors in understanding the behavior of individuals with mental retardation. He argues that personality, emotions, and motivation should be recognized as influential in the performance of retarded individuals, just as they are with nonretarded individuals." "In addition to summarizing Dr. Zigler's developmental formulation of mental retardation, Personality Development in Individuals with Mental Retardation integrates the work of several major researchers as it elaborates the relationship between personality-motivation and cognitive performance."--Jacket.