Sleep

Learner Variable · All learner variables
Evidence · 17 claims (10 show a difference, 4 mixed, 3 no difference) · 10 studies (3 causal, 3 review, 3 associational, 1 quant-synthesis), q2–q3 · 4 of 10 report an effect size · 17 claims rest on one study

Description

Sleep is the period in which consciousness is suspended and the body and brain rest and recuperate. During sleep the brain consolidates memories, the body heals and recovers energy, and waste products of brain activity may be cleared. Its quantity, regularity and quality matter for nearly every aspect of cognition, as well as for physical and emotional well-being. When learners do not get enough good sleep, mood and cognitive skills suffer and focus is lost more easily. Sleep is measured with self-report and parent-report questionnaires on sleep habits, timing, quality and daytime sleepiness. The LVN treats it as relevant from pre-kindergarten to adulthood, and suggests extra cognitive supports, such as redirecting attention when a learner's mind wanders, for students who are short of sleep. It overlaps with physical well-being, of which adequate sleep is a part, and with long-term memory through consolidation.

Implications

Context

• Tired learners benefit from supports that reduce load on attention and memory, such as prompts that bring a wandering mind back.
• Schedules and homework load bear on how much learners sleep.
• Housing and neighbourhood conditions outside the classroom affect sleep quality.

Target Learners

• Adolescents, children and adults with short or irregular sleep.
• Learners with sensory integration difficulties, trauma histories or unstable housing, who are more prone to sleep disturbance.

Target Learning Objectives

• Attention, memory and self-regulation during learning.
• Retention of new knowledge, including vocabulary.
• Mood and emotional well-being.

Claims

• Natural lighting and green window views benefit mood, sleep, cognition, and test performance [+M] — instruction changes it
• Physical well-being — exercise, sleep, and nutrition — impacts learning [+M] — learners who differ on it differ in outcomes
• Path analysis shows sleep disturbance relates to cognitive flexibility indirectly via inhibitory control and working memory, with a non-significant direct path [~M] — learners who differ on it differ in outcomes
• School-based sleep education improves children's sleep duration and quality [+M] — instruction changes it
• Self-reported habitual sleep disturbance is significantly negatively correlated with all three executive function components in 7–9-year-old children [+M] — learners who differ on it differ in outcomes
• Sleep's association with inhibitory control and working memory remains significant after controlling for the other EF components, but cognitive flexibility's does not [~M] — learners who differ on it differ in outcomes
• Delaying school start time by 30 or 60 minutes increased children's sleep duration and reduced daytime sleepiness over two years [+M] — instruction changes it
• Frequent daytime sleepiness is associated with impaired academic achievement, attention, and learning motivation in school-aged children [+W] — learners who differ on it differ in outcomes
• In the intervention trial, short sleep prevalence fell sharply in delayed-start schools (intervention 2: 40.47% to 11.87%) while sufficient-sleep prevalence remained low overall [+M] — instruction changes it
• Irregular sleep is associated with longer target P3 latencies in toddlers [+M] — learners who differ on it differ in outcomes
• P3 amplitudes and sleep duration show no significant associations with sleep deficits or sustained attention in toddlers [-M] — learners who differ on it differ in outcomes
• Short sleep duration (<9 hours) at follow-up is associated with impaired academic achievement, while baseline sleep duration did not significantly predict later school performance [~W] — learners who differ on it differ in outcomes
• The association between sleep duration and school performance is nonlinear (p = 0.04) in generalized additive models [+M] — learners who differ on it differ in outcomes
• Sleep and consolidation support semantic memory development, suggesting delayed school start times may benefit memory [+M] — learners who differ on it differ in outcomes
• Forest preschool shows mixed subjective-outcome effects: improved sleep, resilience, and curiosity, but no changes in academic readiness or illness and injury incidence [~M] — instruction changes it
• In RCTs, effects on stress (g=1.79) and professional burnout (g=0.82) increased at short-term follow-up, while effects on anxiety, sleep, and wellbeing were non-significant [-M] — instruction changes it
• Thirty to forty-eight hours of sleep loss produced no greater efficiency loss than the gain due to practice, despite reported feelings of fatigue [-M] — learners who differ on it differ in outcomes

Measures

• Sleep Timing Questionnaire (Monk et al., 2003): self-report of sleep-wake patterns on weekdays and weekends.
• Pittsburgh Sleep Quality Index (Buysse et al., 1989): self-report of seven aspects of sleep quality, including duration, disturbance, medication and daytime dysfunction.
• Children's Sleep Habits Questionnaire (Owens et al., 2000): parent questionnaire on sleep behaviour for children aged 4 to 12.
• Cleveland Adolescent Sleepiness Questionnaire (Spilsbury et al., 2007): measures daytime sleepiness for ages 11 to 17.

Related Learner Variables

• Adverse Experiences: trauma raises the risk of sleep disturbances.
• Affect Regulation: poor sleep goes with anxiety and low mood.
• Attention: sleep loss weakens sustained attention.
• Long-Term Memory: sleep consolidates newly learned material into long-term memory.
• Physical Well-Being: enough good sleep is part of physical health.
• Socioeconomic Status: poor housing and low-income circumstances go with poorer sleep quality.
• Working Memory: short-term sleep deprivation reduces short-term and working memory.
• Executive Function: poor sleep reduces inhibitory control.
• Self-Regulation: behavioural self-regulation declines when sleep is short or poor.
• Sensory Integration: sensory integration difficulties, especially touch sensitivity, often come with sleep disturbance.
• Safety: unsafe living conditions disturb sleep.
• Communication Skills: sleep supports vocabulary learning, and deprivation affects verbal fluency.

Examples

Key Sources

• Digital Promise. Learner Variability Navigator: Sleep (Adult Learner, Building Literacy 4-6, Building Literacy 7-12, Building Literacy PK-3, Building Math 3-6, Building Math 7-10, Building Math PK-2, Portrait of a Learner 4-8, Portrait of a Learner 9-12, Portrait of a Learner PK-3). lvp.digitalpromiseglobal.org. Licensed CC BY-NC 4.0.

Page metadata

Field	Value
type	learner-variable
id	sleep
title	Sleep
description	How much, how regularly and how well a learner sleeps, the period in which the body and brain rest, recover and consolidate memories.
status	review
canonical	True
generated	by claude/unspecified on 2026-10-16
trust	unverified — no one has confirmed this page's content

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