Sleepless: The Developmental Significance of Sleep Quality and Quantity Among Adolescents

Alexander T. Vazsonyi, Dan Liu, Magda Javakhishvili, Julia J. Beier, Marek Blatny

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The current study tested the developmental significance of both early adolescent sleep quantity and quality for academic competence and internalizing and externalizing problems over the course of 2 years. As part of an accelerated longitudinal study, data were collected from N = 586 Czech adolescents (Mage = 12.34 years, SD =.89, 58.4% female). Data analyses included a series of logistic regressions that controlled for adolescent sex, age, family structure, and socioeconomic status. Findings showed that sleep quality at Wave 1 predicted developmental changes 1 year later (Wave 3) in depression, anxiety, and low self-esteem (ORrange = 1.7–1.8) and 2 years later (Wave 5) in externalizing behaviors (OR = 2.6). Importantly, despite the associations observed with Wave 3 anxiety and deviance, Wave 1 sleep quantity was unrelated to subsequent developmental changes in adjustment measures, both 1 and 2 years later. No sleep effects at all were observed on a variety of measures of academic competence. Study findings underscore the developmental significance of sleep and indicate greater salience of sleep quality vis-à-vis sleep quantity.

Original languageEnglish
Pages (from-to)1018-1024
Number of pages7
JournalDevelopmental Psychology
Issue number6
StatePublished - 2021

Bibliographical note

Publisher Copyright:
© 2021 American Psychological Association


  • Bullying
  • Depression
  • Externalizing
  • Grades
  • Internalizing

ASJC Scopus subject areas

  • Demography
  • Developmental and Educational Psychology
  • Life-span and Life-course Studies


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