The aim of this study was to investigate the role of social capital assessed in early adulthood in linking self-control in childhood with psychological and social functioning in middle age. Data collected at ages 8, 27, and 42 years were based on the Jyvaskyla Longitudinal Study of Personality and Social Development (159 females, 177 males).…

In a response to comments by P. T. Costa, Jr., and R. R. McCrae on the current authors' original article, the authors show that Costa and McCrae's writings on personality suggest a belief in immutability of personality traits. The authors agree with Costa and McCrae that new personality trait models that provide an accurate lower order structure…

A partial sequential design was used to study personality development over a 10-year-period. Data on the Inventory of Psychosocial Development were collected from: a sample of college students in 1966; the same sample as alumni in 1976; and a sample of undergraduates in 1976. (JMB)

The authors examined the prediction of occupational attainment by age 40 from contextual and personal variables assessed during childhood and adolescence in 2 participant samples: (a) the Columbia County Longitudinal Study, a study of 856 third graders in a semirural county in New York State that began in 1960, and (b) the Jyvaskyla Longitudinal…

Used a longitudinal sibling research design and a large, nationally representative sample of 15- to 22-year-old siblings to study shared and unshared environmental influences on delinquency. Although no unshared family environmental influences were found for sisters and mixed-sex siblings, they may have existed for brothers. Data suggested…