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

5 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. They also replicate some of the observed relationships found in previous longitudinal work on the sleep-mood link but extend the sleep-adolescent adjustment literature in a number of important ways

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

Bibliographical note

Funding Information:
We would like to thank the school administrators, teachers, and students for their participation. Data collection was supported by the John I. and Patricia J. Buster Endowed Professorship of Family Sciences to Alexander T. Vazsonyi

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


Dive into the research topics of 'Sleepless: The Developmental Significance of Sleep Quality and Quantity Among Adolescents'. Together they form a unique fingerprint.

Cite this