The current study investigated the patterns of aggressive behavior displayed in a sample of 282 students in the 4th through 7th grades (M age = 11.28; SD = 1.82). Using cluster analyses, two distinct patterns of physical aggression emerged for both boys and girls with one aggressive cluster showing mild levels of reactive aggression and one group…

This study tested several theoretically important differences between youth with a childhood-onset and youth with an adolescent-onset to their severe conduct problems. Seventy-eight pre-adjudicated adolescent boys (ranging in age from 11 to 18) housed in two short-term detention facilities and one outpatient program for youth at risk for…

The current study tests whether the presence of callous-unemotional (CU) traits designates a group of children with conduct problems who show an especially severe and chronic pattern of conduct problems and delinquency. Ninety-eight children who were selected from a large community screening of school children in grades 3, 4, 6 and 7 were followed…