while otherwise clean and solid, back dustjacket flap is split almost all the way down. Almost. “The theme of this study is the importance of studying personality development and personality change in a differentiated way, of identifying and understanding the alternative paths along which people evolve over time. The time is adolescence, with its implications for the life that is later led. And the method is longitudinal. an approach that can respond to questions regarding psychological development not otherwise scientifically accessible.”