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Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
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Time perception, depression and sadness.

Sandrine Gil1, Sylvie Droit-Volet

  • 1Laboratoire de Psychologie Sociale et Cognitive, CNRS, UMR 6024, Université Blaise Pascal, 34 avenue Carnot, Clermont-Ferrand Cedex, France.

Behavioural Processes
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Summary
This summary is machine-generated.

Individuals with depression underestimate time duration, perceiving signals as shorter. This temporal distortion may stem from a slowed internal clock, impacting mood and cognition.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Clinical Psychology

Background:

  • Depression is associated with cognitive alterations.
  • Time perception is a fundamental cognitive function that may be affected by mood states.

Purpose of the Study:

  • To investigate the relationship between depressive symptoms and time perception.
  • To determine if depression influences the accuracy and sensitivity of temporal judgments.

Main Methods:

  • Participants completed the Beck Depression Inventory (BDI) and Brief Mood Inventory Scale (BMIS).
  • A temporal bisection task was used, requiring participants to classify signal durations (400-1600 ms) as short or long.
  • Data were analyzed using statistical modeling.

Main Results:

  • Depressive participants showed a rightward shift in their bisection function, indicating a higher point of subjective equality.
  • Higher depression scores correlated with judging signal durations as shorter.
  • Time perception sensitivity was comparable between depressive and non-depressive groups.

Conclusions:

  • Depressive symptoms lead to an underestimation of time duration.
  • The findings suggest a potential slowing of the internal clock mechanism in individuals with depression.
  • Sadness, as measured by BMIS, partially explains these temporal performance alterations.