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  1. Home
  3. Temporal Proximity To Sleep Determines Emotional Memory Interference.
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  3. Temporal Proximity To Sleep Determines Emotional Memory Interference.

Related Experiment Video

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
08:08

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory

Published on: June 18, 2014

Temporal proximity to sleep determines emotional memory interference.

Yan Cheuk Tsang1, Tao Xia2, William Leung3,4

  • 1Department of Psychology, The University of Hong Kong, Hong Kong SAR, 999077, China.

Learning & Memory (Cold Spring Harbor, N.Y.)
|June 5, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Sleep preferentially strengthens emotional memories encoded closer to sleep onset. This impacts how we recall positive and negative experiences, potentially influencing mood regulation and therapeutic interventions.

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Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
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Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood

Published on: October 2, 2019

Area of Science:

  • Cognitive Neuroscience
  • Sleep Research
  • Affective Science

Background:

  • Emotional memories can be linked to experiences of varying valence and temporal order.
  • The role of sleep in consolidating emotional memories, especially across opposing valence sequences, requires further investigation.

Purpose of the Study:

  • To examine how sleep differentially affects emotional memory valence over time.
  • To compare the impact of sleep versus wakefulness on memory cues associated with positive-to-negative and negative-to-positive sequences.

Main Methods:

  • 120 participants were divided into sleep and wake groups, completing tasks in counterbalanced order.
  • Participants learned pseudoword-picture associations with opposite valence emotional pictures.
  • Emotional valence ratings were assessed immediately after learning and after a 12-hour interval (sleep or wake).

Main Results:

  • Sleep enhanced positive cue ratings in negative-to-positive sequences and negative ratings in positive-to-negative sequences compared to wakefulness.
  • Stronger initial positive picture ratings predicted greater positive valence shifts after sleep in the negative-to-positive condition.
  • Sleep's modulation of affective tone was independent of memory recognition accuracy.

Conclusions:

  • Sleep preferentially consolidates the affective tone of memories encoded closer to sleep onset.
  • A dissociation exists between mnemonic and affective consolidation, with sleep selectively biasing emotional value based on experience timing.
  • Findings suggest potential therapeutic applications for mood optimization by strategically timing experiences before sleep.