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Related Concept Videos

Substance Use Disorders Affecting Sleep01:24

Substance Use Disorders Affecting Sleep

Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
Understanding Sleep01:11

Understanding Sleep

Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
Socioemotional Development during Infancy01:30

Socioemotional Development during Infancy

Socio-emotional development in infancy is primarily shaped by early emotional responses and social connections, with temperament playing a central role. Temperament refers to the consistent patterns in an individual's emotional and behavioral responses, observable even in infancy. By examining temperament, researchers can better understand an infant's unique ways of interacting with the world, influencing subsequent personality and socio-emotional growth.
Primary Temperament Types
Stella Chess...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
Optimal Arousal Theory01:23

Optimal Arousal Theory

The optimal arousal theory suggests that performance is maximized when an individual experiences a moderate level of arousal. This theory is closely tied to the Yerkes-Dodson law, which illustrates an inverted U-shaped relationship between arousal and performance. The law, formulated by psychologists Robert Yerkes and John Dodson, implies an ideal arousal level for optimal performance, and deviations from this level can lead to declines in effectiveness.
Inverted U-Shaped Performance Curve
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REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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Related Experiment Video

Updated: Jul 10, 2026

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

Dynamic Interactions Between Daily Emotional Processing and Sleep Quality in Emerging Adults.

Alexander Ariu1, Andrea H Meyer2,3, Simone Munsch2,4

  • 1Family and Development Research Center, Institute of Psychology, University of Lausanne, Lausanne, Switzerland.

Journal of Sleep Research
|July 9, 2026
PubMed
Summary
This summary is machine-generated.

Daily emotional fluctuations significantly impact sleep quality in emerging adults. Negative emotions like anger and anxiety worsen sleep, while happiness improves it, highlighting emotional well-being

Keywords:
affectecological momentary assessmentemerging adulthoodemotion regulationsleep qualitystress

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Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
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Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

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Last Updated: Jul 10, 2026

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

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
04:33

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Area of Science:

  • Psychology
  • Sleep Science
  • Mental Health

Background:

  • Poor sleep quality is linked to emotional regulation difficulties and mental health issues in emerging adults.
  • Previous research has not fully explored the impact of daily fluctuations in emotions on sleep quality.

Purpose of the Study:

  • To investigate the relationship between daily and weekly emotional processes (affect, stress, emotion regulation) and sleep quality in emerging adults.
  • To examine within-person and between-person associations between emotional states and subsequent sleep quality.

Main Methods:

  • Ecological Momentary Assessment (EMA) over seven days using smartphone-based surveys (four per day).
  • Data collected from 166 emerging adults (mean age 20.36 years, 80.1% female).
  • Linear mixed-effects models analyzed within-person and between-person effects.

Main Results:

  • Within-person: Higher daily anger, anxiety, sadness, and stress predicted lower sleep quality; higher daily happiness predicted better sleep quality.
  • Between-person: Higher weekly negative emotions and rumination predicted lower sleep quality; higher weekly happiness predicted better sleep quality.

Conclusions:

  • Both daily and weekly emotional processes are significantly associated with sleep quality in emerging adults.
  • Negative emotions and rumination act as vulnerability factors for poor sleep, while happiness is a protective factor.