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Updated: Jun 25, 2026

Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
Kindergarten children's failure to qualify for first grade could result from sleep disturbances
Sarit Ravid1, Iris Afek, Suheir Suraiya
1Pediatric Department, Meyer Children's Hospital, Rambam Medical Center and Technion-Israel Institute of Technology, Haifa, Israel.
Insights
Children not ready for first grade often have poor sleep patterns. Sleep disturbances are linked to cognitive and emotional immaturity in young children.
Area of Science:
- Pediatric Sleep Medicine
- Developmental Psychology
- Educational Psychology
Background:
- A significant percentage of preschool children are not ready for first grade annually.
- School readiness is crucial for academic success and overall child development.
- The role of sleep disturbances in school readiness requires further investigation.
Purpose of the Study:
- To investigate the association between sleep disturbances and school readiness in kindergarten children.
- To explore the relationship between sleep patterns, neurocognitive skills, and behavior in children unready for first grade.
Main Methods:
- A cohort of 148 kindergarten students was studied, including 50 identified as unready for first grade (study group) and 98 ready children (control group).
- Sleep patterns were assessed using questionnaires and a week-long actigraphic sleep/wake study.
- Neurocognitive and behavioral assessments were conducted for all participants.
Main Results:
- Children unready for first grade exhibited significantly shorter total sleep time, reduced sleep efficiency, and more nighttime awakenings compared to their peers.
- Significant correlations were found between various sleep parameters and cognitive and behavioral scores.
- Sleep disturbances were strongly associated with cognitive and emotional immaturity.
Conclusions:
- Children failing to meet first-grade readiness criteria demonstrate markedly inferior sleep patterns.
- Sleep disturbances are a significant contributing factor to cognitive and emotional immaturity, impacting school readiness.
Abstract:
Every year, 7% to 15% of preschool children are found to be underqualified for first grade. We examined whether sleep disturbances are factors in school readiness and their association with neurocognitive skills and behavior. The population included 148 kindergarten students. The study group consisted of 50 students who were assessed by the educational authority as unready for first grade. Children who were scheduled to attend first grade (n = 98) were in the control group. All children/parents filled in a sleep questionnaire and underwent a week of actigraphic sleep/wake study as well as cognitive and behavioral assessments. Children in the study group had significantly shorter total sleep time, reduced sleep efficiency, and increased number of nighttime awakenings. There were significant correlations between sleep variables, and cognitive and behavioral scores. In conclusion, children who fail to qualify for first grade have significantly inferior sleep patterns. Sleep disturbances were associated with cognitive and emotional immaturity.
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