He's known in the neighborhood as a bully. Johnny may not simply grow out of it.
CD often escalates into criminal behavior and imprisonment.
Impulsive people act before they think, and often find themselves in trouble as a result. And the program is unique in comparing children with their parents to learn about biological and environmental components of impulsivity. One of the computer tasks shows how impulsivity is evaluated. The computer flashes a random sequence of five-digit numbers on the screen every few seconds and participants click when they see the same number twice in a row. Other tasks assess how fast the teens can stop a response and whether they can delay gratification.