Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Correlations

Correlations

Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...

Insufficient Sleep and Sleep Deprivation

Insufficient Sleep and Sleep Deprivation

Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...

Sleep-Wake Cycles

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:

Blind Procedures

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...

Stages of Sleep

Stages of Sleep

Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...

Substance Use Disorders Affecting Sleep

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,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Intelligence and Dietary Habits: An International Study of Mensa Members.

Journal of Intelligence·2025

Same author

Cognitive, affective and sociological predictors of school performance in mathematics.

Scientific reports·2024

Same author

Correlates of sleep variability in a mobile EEG-based volunteer study.

Scientific reports·2024

Same author

Disruption of sleep macro- and microstructure in Alzheimer's disease: overlaps between neuropsychology, neurophysiology, and neuroimaging.

GeroScience·2024

Same author

The clinical effectiveness of the Mind/Body Program for Infertility on wellbeing and assisted reproduction outcomes: a randomized controlled trial in search for active ingredients.

Human reproduction (Oxford, England)·2024

Same author

The SCREENIVF Hungarian version is a valid and reliable measure accurately predicting possible depression in female infertility patients.

Scientific reports·2024

Search research articles

Related Experiment Video

Updated: Jul 1, 2025

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression

Published on: April 26, 2024

Objective sleep quality predicts subjective sleep ratings.

Róbert Pierson-Bartel¹, Péter Przemyslaw Ujma²

¹Institute of Behavioural Sciences, Semmelweis University, Budapest, Hungary.

Scientific Reports

|March 12, 2024

Summary

Subjective sleep quality ratings reflect objective sleep patterns within individuals. This study found that personal sleep metrics like sleep onset latency and total sleep time influence daily self-reported sleep quality.

Keywords:

Mobile EEG Multiday observational study Multilevel model Self-report Sleep quality Within-subject comparison

More Related Videos

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

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

Published on: October 2, 2019

Author Spotlight: Utilizing Traditional Chinese Acupuncture of the Ear to Improve Sleep Disorders

Author Spotlight: Utilizing Traditional Chinese Acupuncture of the Ear to Improve Sleep Disorders

Published on: August 18, 2023

Related Experiment Videos

Last Updated: Jul 1, 2025

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression

Published on: April 26, 2024

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

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

Published on: October 2, 2019

Author Spotlight: Utilizing Traditional Chinese Acupuncture of the Ear to Improve Sleep Disorders

Author Spotlight: Utilizing Traditional Chinese Acupuncture of the Ear to Improve Sleep Disorders

Published on: August 18, 2023

Area of Science:

Sleep Science
Neuroscience
Psychology

Background:

Subjective sleep quality assessment via self-report is common in clinical and observational studies.
Previous research shows mixed results on the accuracy of self-reported sleep quality compared to objective measures, often confounded by between-subject designs.

Purpose of the Study:

To investigate the relationship between within-subject variations in subjective sleep quality and objectively measured sleep parameters.
To address limitations of previous between-subject analyses by focusing on intra-individual changes.

Main Methods:

Utilized the Budapest Sleep, Experiences and Traits Study (BSETS) dataset.
Employed a mobile electroencephalography (EEG) headband for objective sleep assessment.
Analyzed within-subject differences in subjective sleep quality against sleep macrostructure and quantitative EEG variables.

Main Results:

Found significant within-subject associations between self-reported sleep quality and variations in sleep onset latency, wake after sleep onset, total sleep time, and sleep efficiency.
Replicated findings using detailed sleep composition metrics and alternative subjective sleep quality measures.
Observed no significant effect of awakenings or relative EEG delta and sigma power on subjective ratings.

Conclusions:

Within-subject variations in objective sleep parameters significantly influence subjective sleep quality ratings.
Previous studies may have been confounded by between-subject effects, masking the true relationship between objective and subjective sleep.
Objective sleep quality is demonstrably reflected in subjective sleep ratings when analyzed appropriately.