As Latin American countries moved from military dictatorship to civilian government in the 1980s, a burning issue was how to deal with the massive repression and grave human rights violations of the recent past. Should there be an effort to hold perpetrators accountable, or simply "turn the page?" This article documents and analyzes the…

We examined aggressive behavior in 6- to 12-year-old children, including 20 children with attention deficit hyperactivity disorder (ADHD) on stimulant medication, 19 children with ADHD on placebo (n = 19), and 32 controls. Children completed a laboratory provocation task designed to measure hostile, instrumental, reactive, and proactive…