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How Much Does Sleep Vary from Night to Night? A Quantitative Summary of Intraindividual Variability in Sleep by Age, Gender, and Racial/Ethnic Identity

Description: Habitual (i.e., average or typical) sleep duration and sleep efficiency vary widely by demographic characteristics, including age, gender, and racial/ethnic identity. Despite a wealth of studies on demographic patterns in habitual sleep, these results are often based on cross-sectional surveys, which ask participants to retrospectively recall their "typical" or "recent" sleep. Yet, sleep is a highly dynamic behavior and may fluctuate substantially from night-to-night. This intraindividual varia… more
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Date: May 2022
Creator: Messman, Brett A
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Insomnia and Cognitive Performance: A Systematic Review and Meta-Analysis

Description: Daytime cognitive performance and sleep/wake cycles are strongly interrelated, and cognitive dysfunction has been extensively investigated in relation to insomnia. However, methods and outcomes vary widely by study, making comparison difficult without more systematic evaluation. Review of the literature reveals discrepant findings for the relationship between both subjective and objective measures of cognitive performance and insomnia. The current meta-analysis included 42 studies investigating… more
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Date: May 2019
Creator: Pinkston, Sophie Wardle
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Sleep-deprivation effect on human performance: a meta-analysis approach

Description: Human fatigue is hard to define since there is no direct measure of fatigue, much like stress. Instead fatigue must be inferred from measures that are affected by fatigue. One such measurable output affected by fatigue is reaction time. In this study the relationship of reaction time to sleep deprivation is studied. These variables were selected because reaction time and hours of sleep deprivation are straightforward characteristics of fatigue to begin the investigation of fatigue effects on pe… more
Date: May 1, 2006
Creator: Griffith, Candice D.; Griffith, Candice D. & Mahadevan, Sankaran
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Comparison of the Pittsburgh Sleep Quality Index, a New Sleep Questionnaire, and Sleep Diaries

Description: Self-report retrospective estimates of sleep behaviors are not as accurate as prospective estimates from sleep diaries, but are more practical for epidemiological studies. Therefore, it is important to evaluate the validity of retrospective measures and improve upon them. The current study compared sleep diaries to two self-report retrospective measures of sleep, the commonly used Pittsburgh Sleep Quality Index (PSQI) and a newly developed sleep questionnaire (SQ), which assessed weekday and w… more
Date: August 2012
Creator: Sethi, Kevin J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Sleep Loss and Risk-taking Behavior

Description: While sleep loss has been shown to have detrimental effects on cognitive, physiological, and psychological processes, it has only recently been investigated as a possible causal factor of risk-taking behavior (i.e., a conscious choice to engage in dangerous behavior despite knowledge of possible loss or harm). Among the few studies that have been conducted in this field, the majority found that as individuals become sleepier, their propensity to engage in risk-taking behavior increased. The r… more
Date: August 2012
Creator: Womack, Stephanie D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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