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Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
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Chronotype differences in suicidal behavior and impulsivity among suicide attempters.

Yavuz Selvi1, Adem Aydin, Abdullah Atli

  • 1Department of Psychiatry, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey. dryavuzselvi@yahoo.com

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Summary

Evening chronotypes show higher impulsivity, increasing the risk for violent suicide attempts. This study links chronotype, impulsivity, and suicide attempt methods in attempters.

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Area of Science:

  • Psychiatry
  • Chronobiology
  • Psychology

Background:

  • Chronotype, referring to an individual's daily activity patterns, is linked to various psychological and biological factors.
  • Research increasingly explores the connection between chronotype and personality traits, including impulsivity.

Purpose of the Study:

  • To investigate the relationship between chronotype and impulsivity in individuals who have attempted suicide.
  • To determine if chronotype influences the method of suicide attempt.

Main Methods:

  • Eighty-nine suicide attempters were assessed for chronotype using the Morningness-Eveningness Questionnaire.
  • Impulsivity was measured using the Barratt Impulsiveness Scale.
  • Data on suicide attempt characteristics were systematically recorded.

Main Results:

  • Evening-type individuals reported significantly higher impulsivity scores compared to morning-type and intermediate chronotypes.
  • A significant association was found between chronotype and the type of suicide attempt.
  • Evening-type individuals constituted the largest proportion of violent suicide attempters.
  • Violent suicide attempters exhibited significantly higher impulsivity scores than nonviolent attempters.

Conclusions:

  • Eveningness may be an independent risk factor for violent suicide attempts, potentially mediated by increased impulsivity.
  • Understanding chronotype-related impulsivity could inform targeted suicide prevention strategies.