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<p>The biological underpinnings of self-harm in young people are unclear. Self-harm often serves to regulate emotions, and electrodermal activity (EDA) is a well-established biomarker of emotional arousal, which is physiologically related to emotion regulation. A quasi-experimental case control study using predefined groups was conducted. Three groups of young people (16–25 years; <i>n</i> = 180) with different self-harm histories were recruited: no self-harm history (<i>n</i> = 62), self-harm ideation last year with no enaction (<i>n</i> = 51) and self-harm enaction last year (<i>n</i> = 67). EDA was measured during three tasks: an auditory tones habituation task, a psychosocial stress task and an emotional images task. Those in the self-harm enaction group elicited a heightened EDA response (hyperreactivity) across two tasks, specifically a slower habituation rate to auditory tones and higher EDA during the psychosocial stress task compared to other groups. High levels of non-response during the emotional images task limited analyses. These findings expand our understanding of the biomarkers for self-harm, specifically emotional arousal in young people who self-harm. Specifically, they suggest that those with a history of self-harm exhibit a heightened electrodermal response to both stressful and non-stressful stimuli compared to those who have no history of self-harm and those who have only thought about self-harm.</p>

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Emotion processing and electrodermal activity in young people who self-harm

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月5日

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  • Karen Wetherall,
  • Seonaid Cleare,
  • Nadia Belkadi,
  • Marianne E. Etherson,
  • Krystyna J. Loney,
  • Susan Mathew,
  • James Munro,
  • Ellen Townsend,
  • Matthew K. Nock,
  • Eamonn Ferguson,
  • Rory C. O’Connor

摘要

The biological underpinnings of self-harm in young people are unclear. Self-harm often serves to regulate emotions, and electrodermal activity (EDA) is a well-established biomarker of emotional arousal, which is physiologically related to emotion regulation. A quasi-experimental case control study using predefined groups was conducted. Three groups of young people (16–25 years; n = 180) with different self-harm histories were recruited: no self-harm history (n = 62), self-harm ideation last year with no enaction (n = 51) and self-harm enaction last year (n = 67). EDA was measured during three tasks: an auditory tones habituation task, a psychosocial stress task and an emotional images task. Those in the self-harm enaction group elicited a heightened EDA response (hyperreactivity) across two tasks, specifically a slower habituation rate to auditory tones and higher EDA during the psychosocial stress task compared to other groups. High levels of non-response during the emotional images task limited analyses. These findings expand our understanding of the biomarkers for self-harm, specifically emotional arousal in young people who self-harm. Specifically, they suggest that those with a history of self-harm exhibit a heightened electrodermal response to both stressful and non-stressful stimuli compared to those who have no history of self-harm and those who have only thought about self-harm.