The purpose of this research paper is to find a correlation between peer, genetic, and environmental influences and the behavior and personality development during childhood. This study focuses on the 1999 Columbine High School Massacre to try to explain certain kinds of behavior. The study made on 275 freshmen at Cornell University showed that…

The concept of autonomous identity, derived from Piaget's theory of personality, is distinguished from other applications of the term "autonomy" in psychological theory. Introductory comments suggest that both biological and mental development express autonomy in the same two senses: as self-regulating and progressively self-liberating.…

Investigated long-term effects of infant temperament on problem behavior and cognitive abilities at age 5 years, taking into account interactions between infant temperament and biological and social risk. Found that when high scores on temperamental factors are combined with social or biological risk, the level of later behavioral problems is…