Network researchers compared PCL assessments over time for 200 juveniles versus 120 adults, divided evenly between “psychopathic” and “non-psychopathic” individuals. Adolescents and adults were recruited from secure facilities and interviewed and assessed at four different times: baseline, one month, one year, and two years. The researchers also assessed three developmental characteristics: responsibility (including resistance to peer pressure), perspective, and self-control. Preliminary results suggest that juveniles’ scores on the PCL-YV, relative to adults, declined more over time. One logical conclusion, the researchers suggest, is that the decline in scores among teens may stem from their increasing maturity.