Lacourse Eric, Nagin Daniel, Tremblay Richard E, Vitaro Frank, Claes Michel
Carnegie Mellon University, USA.
Dev Psychopathol. 2003 Winter;15(1):183-97. doi: 10.1017/s0954579403000105.
Being part of a delinquent group has been shown to facilitate the expression of an individual's own delinquent propensities. However, this facilitation effect has not been investigated from a developmental perspective within a population heterogeneity model. Using a semiparametric mixture model with data from the Montreal Longitudinal Experimental Study, this article addresses important issues in the developmental trends of membership to delinquent groups. We explore how the rate of violent behaviors follows delinquent peer group trajectories and investigate a differential facilitation effect of delinquent peers on violence across multiple developmental pathways. Results suggest that 25% of males followed a childhood or an adolescence delinquent group affiliation trajectory. These two groups account far most of the violent acts assessed during adolescence. In addition, the rate of violent behaviors follows these developmental trajectories. Controlling for these delinquent group trajectories, we also found that being involved in a delinquent group at any specific time during adolescence is associated with an increased rate of violent behaviors, and that leaving these groups results in a decrease in violent behaviors. This facilitation effect appears homogeneous over time and across developmental trajectories. Results are discussed from a social interactional perspective.
已有研究表明，加入不良群体有助于个体自身不良倾向的表达。然而，在群体异质性模型中，尚未从发展的角度对这种促进作用进行研究。本文使用半参数混合模型和来自蒙特利尔纵向实验研究的数据，探讨了加入不良群体发展趋势中的重要问题。我们研究了暴力行为发生率如何随着不良同伴群体轨迹变化，并调查了不良同伴对多种发展路径下暴力行为的不同促进作用。结果表明，25%的男性遵循童年或青少年期加入不良群体的轨迹。这两组人占了青春期评估的暴力行为的绝大部分。此外，暴力行为发生率也遵循这些发展轨迹。在控制了这些不良群体轨迹后，我们还发现，在青春期的任何特定时间加入不良群体都与暴力行为发生率增加有关，而离开这些群体则会导致暴力行为减少。这种促进作用在时间和发展轨迹上似乎是一致的。我们从社会互动的角度对结果进行了讨论。
