This study investigates smartphone addiction prevalence among Tunisian middle school students and its associations with sleep quality, fatigue, cognitive functioning, and academic achievement. Using structured interviews, we collected demographic data, grade point averages, and phone usage details from 1015 students aged 14-16. Participants also…

To explore the relationships between autistic traits, self-control, mindfulness, and sleep quality, and the mechanism underlying these relationships, we recruited a sample of 972 junior high school students who completed a survey consisting of the Chinese version of the Comprehensive Autistic Trait Inventory-short form, Self-Control Scale, Child…

Background: Research has been inconclusive as to whether stimulant treatment causes or exacerbates sleep problems in adolescents with ADHD. This study examined sleep differences in adolescents with ADHD as a function of stimulant use. Methods: Participants were adolescents with ADHD (N=159, ages 12-14). Parents reported on receipt of stimulant…

The recent increase in mental health problems and private tutoring (also called shadow education) among adolescents has been widely documented. This study relates involvement in private tutoring to depressive symptoms using data from a nationally representative sample of middle school students (grades 7-9, M[subscript age] = 13.90, N = 25,862) in…

Introduction: Existing research indicates high prevalence of emotional problems among adolescents with excessive academic burden, yet the underlying reasons are not well understood. This study aimed to explore loneliness, physical activity, and sleep as potential mediating pathways between academic burden and emotional problems in adolescents.…

Insufficient sleep and sleepiness are common in adolescence and can negatively impact school performance. The current study examined sleep duration and sleepiness in academic performance and cognitive processes in early adolescence. Middle school students (N = 288; M[subscript age] = 12.01; 54% female; 48% Black, 37% White, 10% Hispanic) wore…

Objective: Children's lifestyle behaviours significantly affect childhood obesity. The impact of a body mass index reduction intervention applied to secondary school students on their eating behaviour, physical activity, sleep quality and obesity was in the focus of this research. Method: A quasi-experimental pre-post design was employed. The…

Insufficient sleep and sleepiness are common in adolescence and can negatively impact school performance. The current study examined sleep duration and sleepiness in academic performance and cognitive processes in early adolescence. Middle school students (N = 288; M[subscript age] = 12.01; 54% female; 48% Black, 37% White, 10% Hispanic) wore…

Purpose: We assess whether school start times predict the engagement and achievement outcomes of middle grades students. Our focus on middle grades is important because biological changes in sleep often begin when adolescents are in middle school and because middle school is a time when more students struggle academically. Research…

Throughout adolescence, both sleep and emotion regulation abilities undergo significant developmental changes. The maturational systems that govern sleep and emotion regulation are closely intertwined leading many researchers to posit a mutually reinforcing relationship. Although there is support for a bidirectional relationship among adults,…

High sleep quality has been associated with beneficial outcomes across the life span. Intensive longitudinal studies suggest that these beneficial effects can also be observed on a day-to-day level. However, the dynamic interplay between subjective sleep quality and affective well-being in children's daily life has only rarely been investigated.…

Purpose: Studies of college and university student suicide have identified predictors only of suicide ideation and attempts and have relied solely on self-report data. This study explores risk factors observed in the last 30 days of life of college and university students who died by suicide, compared to those of high school and middle school…

This dissertation examines the effects of neighborhood characteristics on Detroit Public School Community District students' attendance rates for the 2018-19 school year. First, I analyze the effects of daylight savings time, relative to school start time, on absences for elementary and middle school students. By observing the natural change in…

Background and Purpose: Sleep is an important determinant of health in adolescence, but many adolescents around the world are sleep-deprived. Compared to children and adults, getting enough sleep is especially challenging for adolescents due to the natural alteration of circadian rhythms that govern sleep-wake cycles. The delayed circadian rhythm…

Feeling safe in school is important for students' learning, well-being, and quality of life. Variables possibly associated with feeling unsafe in school, such as mental health problems, traditional bullying, cyberbullying, and various health problems, were explored. Altogether, 2,028 adolescents (M[subscript age] = 14 years, 50% boys) from 72…