We examined the effects of early life stress (ELS) on intellectual ability in 2,725 20-year-old male participants, of whom 321 were separated temporarily (mean 1.7 years) from both their parents during World War II, at an average age of 4.3 years. Intellectual ability was tested when entering compulsory military service. The separated men had…

General cognitive ability ("g") does not explain sex differences in academic test performance by the end of compulsory education. Instead, individual differences in specific reasoning abilities, after removing the effects of "g," may contribute to the observed gender gaps. Associations between general or specific cognitive…

The relationship between academic failure and poor verbal abilities was studied in young aggressive boys. Results did not indicate a generalized deficit in verbal development among young aggressive boys. However some deficit in mediational use of verbal ability may be present in aggressive boys. (Author/MV)

The neuropsychological status and neuromotor performance of adolescent boys from lower-middle-class social environments who were detained as juvenile delinquents were compared to those of nondelinquent lower- and upper-middle-class controls. Principal aims were to investigate relationships between delinquency and learning disabilities,…

Subgroups based on differences in Verbal IQ/Performance IQ patterns of 65 learning disabled boys (grades 3-6) were examined through peer nominations of popularity, rejection, behavior problems, and teacher ratings. Those whose Verbal and Performance IQ scales were approximately equal were most often rejected by peers and were perceived as more…