The ability of youth psychopathy to predict future legal outcomes diminishes with time

What is it about?

Young people who get into serious trouble with the law are sometimes evaluated for personality traits linked to psychopathy, such as a lack of empathy, impulsive behavior, or manipulation of others. These assessments can influence important decisions about their lives, including sentencing, treatment, supervision, and whether they are considered likely to offend again in the future. In adults, a high psychopathy score is thought to be a stable personality condition which signals long-term risk. However, an important question remains: Do these traits measured during adolescence actually predict what someone will be like years later as an adult? This study examined that question by following more than 1,100 justice-involved boys over a period of seven years, from their teenage years into young adulthood. The researchers looked at whether psychopathic traits measured during adolescence could predict three important outcomes over time: whether these traits continued into adulthood, whether the youth continued to engage in criminal behavior, and whether they were arrested again. The findings showed that psychopathic traits measured during adolescence did have some ability to predict later outcomes, especially in the short term. However, that predictive ability became weaker as the years passed. In other words, a teenager who scored high on these measures was not necessarily destined to show the same traits or behaviors as a young adult. While higher scores continued to be associated with a greater likelihood of future arrests, their ability to predict personality and self-reported offending decreased substantially over time. These findings highlight that adolescence is a period of significant growth and change. Many young people mature, develop emotionally, and make positive changes as they transition into adulthood. Because of this, assessments completed during the teenage years should not be viewed as permanent labels or used to make long-term predictions about a young person's future. Instead, they may be most useful for identifying current needs, guiding treatment, and providing support during adolescence, when opportunities for positive change are greatest.

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Photo by ALEJANDRO POHLENZ on Unsplash

Photo by ALEJANDRO POHLENZ on Unsplash

Why is it important?

The most popular and widely used instrument for assessing future violence and recidivism risk is the Psychopathy Checklist. This measure of psychopathic traits has been applied to juveniles in order to inform long-term legal decisions about their risk, even into adulthood. These findings importantly challenge the appropriateness of this practice, and also challenge the idea that psychopathic traits measured during adolescence represent a fixed or lifelong condition. Instead, we should recognize that the transition from adolescence to adulthood is a time of change and promise, and an adolescent's psychopathy score says less about their future traits and behavior seven years down the line than it does about their short-term outcomes. By better understanding the limits of long-term prediction during adolescence, this work has important implications for researchers, clinicians, policymakers, and anyone interested in juvenile justice and youth development.

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