Inefficiency of post-error adjustment in impulsive violent offenders

Chiao Yun Chen, Neil G. Muggleton, Jia Ren Chang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Criminal offenders who show repeated impulsive violent behavior are often described as having impairments in both inhibitory control and error processing. A sample of such offenders was compared with controls using event-related potentials recorded during the performance of a combined flanker and stop-signal task with the aim of investigating the underlying mechanisms that may contribute toward such violent behavior by indexing conflict monitoring, error detection, and post-error processing. The results obtained indicated lower amplitude of the stop-signal N2 component for successfully inhibited trials, reflecting different degrees of inhibition in impulsive violent offenders, as well as a reduced Pe component over the parietal area, an indication of reduced awareness of errors. This is consistent with the behavioral data indicating a lack of post-error slowing compared with the control group. This suggests that these offenders have problems with error awareness, subjective error assessment processes, and the adjustment of future behavior.

Original languageEnglish
Pages (from-to)1024-1029
Number of pages6
Issue number13
StatePublished - 10 Sep 2014


  • N2
  • P3
  • Pe
  • error detection
  • flanker/stop-signal task
  • impulsive violent behavior
  • inhibition
  • post-error slowing


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