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…

A prospective study investigated associations between preschool temperament and environmental factors and school-age personality in 93 Swedish children. Found that personality was predicted by early temperament and environmental factors such as external day care and negative life events. Extraversion was most clearly related to temperament.…