Zhang Zhuo, Wang Qianglong, Liu Xu, Song Ping, Yang Bo
School of Sociology, China University of Political Science and LawBeijing, China.
School of Criminal Justice, China University of Political Science and LawBeijing, China.
Front Hum Neurosci. 2017 Jul 24;11:373. doi: 10.3389/fnhum.2017.00373. eCollection 2017.
Inhibitory control dysfunction was considered a universal characteristic of violent offenders. The aim of this study was to examine differences in inhibitory control between two subtypes of violent youth; those displaying predominantly impulsive and those presenting predominantly premeditated aggression (PM). Forty-four juvenile offenders, defined on the basis of the Procedures for the Classification of Aggressive/Violent Acts (Stanford and Barratt, 2001) participated ( = 23: impulsive; = 21 premeditated). A visual Go/NoGo task was used to compare behavioral responses and event-related potentials (ERPs) between groups. The task contained two letters (W and M), W was the Go stimulus and M the NoGo stimulus. The impulsive youth showed a significantly greater decrease in N2 latency for Go relative to NoGo trials than the premeditated aggressive youth. The differentiation in N2 amplitude between Go and NoGo (N2d) was negatively correlated with impulsivity of aggression. Both groups showed no significant central NoGo P3. Our findings suggest that impulsive violent youth show stronger prepotent responses and impaired conflict monitoring during early inhibitory control processing relative to premeditated aggressive youth. Both impulsive and premeditated violent youth may show impaired response inhibition at the late processing stage of inhibitory control.
抑制控制功能障碍被认为是暴力罪犯的一个普遍特征。本研究的目的是检验两类暴力青少年在抑制控制方面的差异；一类主要表现为冲动型，另一类主要表现为预谋型攻击（PM）。根据《攻击/暴力行为分类程序》（斯坦福和巴拉特，2001年）界定的44名少年罪犯参与了研究（冲动型=23人；预谋型=21人）。采用视觉Go/NoGo任务比较两组之间的行为反应和事件相关电位（ERP）。该任务包含两个字母（W和M），W为Go刺激，M为NoGo刺激。与预谋型攻击的青少年相比，冲动型青少年在Go试验中N2潜伏期相对于NoGo试验的下降幅度明显更大。Go和NoGo之间的N2波幅差异（N2d）与攻击冲动性呈负相关。两组在中央NoGo P3方面均无显著差异。我们的研究结果表明，相对于预谋型攻击的青少年，冲动型暴力青少年在早期抑制控制过程中表现出更强的优势反应和冲突监测受损。冲动型和预谋型暴力青少年在抑制控制的后期处理阶段可能都表现出反应抑制受损。
