Unintended consequences: college students' melatonin usage, sleep disturbance, and depressive symptoms.

With such high rates of undergraduate sleep problems, students have chosen to take melatonin, an over-the-counter supplement that can facilitate sleep. Questions remain as to the effectiveness of melatonin for sleep problems, and questions have emerged about its impact on mental health. Accordingly, the current study examined how ongoing melatonin usage might impact relative changes in college students' sleep disturbance and ultimately their depressive symptoms. The two-wave (baseline and 2-month follow-up), online sample consisted of 331 undergraduates (86% female; Mage = 21.3, SD = 2.4), who reported on melatonin usage, sleep disturbance, and depressive symptoms. Controlling for sleep hygiene, socio-economic status, and gender, our model demonstrated a significant indirect effect from ongoing melatonin usage to depressive symptoms. Specifically, melatonin consumption predicted relative increases in sleep disturbance, which, in turn, predicted corresponding increases in students' depressive symptoms. Given the increasing prevalence of melatonin usage, the potential for unforeseen consequences remains high. Results suggest that the negative consequences of melatonin use can include both college students' mental health and their sleep. Given the efficacy of addressing sleep problems with cognitive or behavioral strategies, it is essential that student support services highlight alternatives to melatonin and the potential problems associated with its use.

Psychological processes linking problematic smartphone use to sleep disturbance in young adults.

OBJECTIVES: With such high rates of sleep and mental health problems among undergraduate students, understanding potential antecedents of these interrelated problems has emerged as a critical area of examination. One potential factor underlying these problems is problematic smartphone use, which is defined as excessive phone use, impulse control problems related to the use, and negative consequences stemming from these behaviors. Accordingly, the current study sought to examine how relative changes in problematic smartphone use might impact college students' sleep disturbance via their psychological functioning (ie, psychological inflexibility and anxiety symptoms). METHODS: The 2-wave (baseline and 2-month follow-up) online sample consisted of 385 undergraduates (81% female; M = 20.0, SD = 1.6), who reported problematic smartphone use, psychological flexibility, anxiety symptoms, and sleep disturbance. RESULTS: Controlling for baseline levels of sleep hygiene, age, and gender, our model demonstrated a significant indirect effect from problematic smartphone use to sleep disturbance. Specifically, relative increases from baseline to the 2-month follow-up in students' problematic smartphone use predicted subsequent increases in psychological inflexibility, which predicted increases in anxiety symptoms, which, in turn, predicted increases in sleep disturbance. CONCLUSIONS: Given the ubiquity of college students' smartphone use, the potential for problematic use remains high. Results suggest that the negative consequences of problematic smartphone use not only can include college students' mental health but also their sleep. With such high levels of college students suffering from mental health and sleep problems, clinicians and college administrators should consider the potential sequelae of the problematic use of smartphones.

COVID-related stressors and their impact on parental sleep, parenting behaviors, and child functioning.

This longitudinal study examined the impact on families of multiple stressors that emerged due to the COVID-19 pandemic. Accordingly, we modeled the indirect effects of three stressors (i.e., the stress of new childcare and work demands, financial stress, and health-related stress assessed within the first month of the pandemic in the United States) on children's functioning over the next 8 weeks via the mediating pathways of parental sleep quality and two forms of parenting (i.e., angry/hostile, constructive). The longitudinal sample of 701 parents (81.5% female; Mage = 41.7, SD = 8.2) reported an average of 1.8 children (SD = 1.0) living in the home (Mage = 9.8 years old, SD = 5.8 years). Multilevel results suggested that, at the within-families level (Level 1), drops in parental sleep on a specific week predicted corresponding increases in angry/hostile parenting, which predicted increases in children's distress during that same week. At the between-families level (Level 2), baseline levels of stress from new demands were predictive of stably higher levels of angry/hostile parenting, which predicted stably higher levels of children's distress across the 8 weeks of the study. Furthermore, baseline health-related stress and financial stress predicted lower stable levels of parental sleep quality, which predicted higher stable levels of children's distress. Finally, health-related stress predicted lower levels of parental sleep quality, which predicted higher levels of angry/hostile parenting, which predicted higher levels of children's distress. Findings highlight the important role that parents' sleep plays in both parenting and children's functioning during periods of high stress. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Dispositional mindfulness predicting psychological adjustment among college students: the role of rumination and gender.

OBJECTIVE: This study examined rumination as a mediator of the relationship between dispositional mindfulness (DM) and depression, loneliness, and anxiety, while considering gender as a moderator of these mediation models. PARTICIPANTS: Three hundred and nineteen undergraduate students (49.5% female; M = 18.90 years) participated with data collected from January 2018 to April 2019. METHODS: Self-report measures of DM, rumination, symptoms of anxiety and depression, loneliness, and social support were completed. RESULTS: Males scored significantly higher than females on DM, while females scored significantly higher than males on rumination and psychological distress. Rumination mediated the relationship between DM and all adjustment variables. The mediation model predicting depression was moderated by gender, showing stronger effects for females than males. CONCLUSION: Results support rumination as a mechanism underlying the association between DM and psychological adjustment and suggest that targeting both DM and rumination could maximize the effectiveness of mindfulness-based interventions for college students' well-being.

The impact of psychological flexibility on family dynamics amidst the COVID-19 pandemic: A longitudinal perspective.

Background: Health risks associated with contracting COVID-19, stay-at-home orders, and pandemic-related economic and social hardships created unique challenges for individuals throughout the pandemic, and in particular for families whose daily routines were disrupted at the start of the pandemic. This study applied a contextual behavioral science lens to Family Systems Theory to examine the impact of COVID-19 stressors on family and individual functioning. Methods: A sample of 742 coparents (86% married/engaged; 84% Caucasian; 71% female; M = 40.7 years old, SD = 8.1; M income = $82,435, SD income = $27,604) of school-aged children (5-18 years old) completed a baseline survey from late March to late April 2020. Of the initial sample, 556 coparents completed weekly diaries for 8 weeks. Results: Mediation models were tested within a multilevel path modeling framework to evaluate both the stable, between-family differences (i.e., at level 2) and the within-family changes from week to week (i.e., at level 1). Across both levels of the model, parent psychological inflexibility was robustly linked to poorer functioning across all levels of the family system, showing direct links to a majority of the processes assessed. The results further supported a top-down spillover cascade in which parent inflexibility was proximally linked to greater COVID-19 related stress and parent depressive symptoms, which were proximally linked to poorer romantic functioning (greater negative conflict, lower satisfaction), which were proximally linked to poorer family functioning (greater coparent discord and family chaos), which were proximally linked to poorer parenting (greater angry/reactive parenting), which was proximally linked to greater child distress. Multi-group models suggested that the results were largely stable across (1) parent race (white vs non-white), (2) family size (1 child vs 2 or more), (3) child age (less than 10 years old vs 10 or older), (4) parent age (under 40 vs. 40 or older), (5) perceived COVID-19 risk, (6) parent gender (mothers vs fathers), (7) household income groups (less than $100k vs $100k or more), and (8) perceived economic stress/uncertainty (low vs high). However, a handful of moderated effects emerged from those multi-group models suggesting that fathers might be slightly more prone to negative spillover effects across the family systems and that wealthier families might have experienced the stress of new demands (e.g., homeschooling, remote working) as more disruptive. Conclusions: Results highlight the crucial role parental psychological flexibility and inflexibility play in families managing the stress of COVID-19, as well as key mechanisms for how those stressors may either reverberate or become dampened throughout the family system.

The development of a scale to assess children's and adolescents' sleep environments.

STUDY OBJECTIVES: To develop a measure of children's sleep environments and to assess its initial reliability and validity. METHODS: This cross-sectional study consisted of an online survey for parents of children ages 5-18 years across the United States. A total of 840 parents/caregivers (Mage = 40.6 years, standard deviation = 8.6; 72.0% female) completed surveys regarding a target child (Mage = 10.4 years, standard deviation = 3.8). The items on the scale that was developed were evaluated with exploratory and confirmatory factor analyses in separate random sample halves of the dataset. Cronbach's alpha coefficients were calculated to assess internal consistency across multiple demographic groups. We explored convergent and discriminant validity by examining associations with measures from the nomological net of constructs surrounding the children's sleep environment. Finally, we examined incremental/unique predictive validity of the full scale and its subscales through regression analyses. RESULTS: The Children's and Adolescents' Sleep Environment Scale (13 items) produced 3 factors: general environmental hazards (7 items), availability of bedding materials (2 items), and presence of electronics (4 items). The full scale and its subscales showed strong discriminant validity, and analyses suggested that the Children's and Adolescents' Sleep Environment Scale and its subscales were generalizable across diverse demographic groups. Finally, after controlling for children's sleep hygiene, sleep disturbances, behavioral problems, and family functioning, the full-scale Children's and Adolescents' Sleep Environment Scale significantly predicted children's sleepiness, as did the general environmental hazards and presence of electronics subscales in a separate regression analysis. CONCLUSIONS: The Children's and Adolescents' Sleep Environment Scale shows strong psychometric properties and has emerged as both a reliable and valid indicator of children's and adolescents' sleep environments and their potential impact on children's sleep and sleep-related behavior. CITATION: Peltz JS, Rogge RD, Elmore-Staton L, Spilsbury J, Buckhalt JA. The development of a scale to assess children's and adolescents' sleep environments. J Clin Sleep Med. 2022;18(10):2353-2365.

The day-to-day impact of nighttime noise disturbances on college students' psychological functioning.

ObjectiveTo understand environmental predictors (i.e., nighttime noise disturbance) of sleep health (i.e., restedness) in residential college students and its potential mental health consequences, this study examined daily variation in restedness upon awakening as a potential mediator between nightly environmental noise disturbances and daily fluctuations in depressive and anxiety symptoms. Participants: The sample was comprised of 283 college students (Mage = 19.9, SD = 1.9; 79% female). Methods: Multilevel structural equation modeling was conducted based on an initial self-report, online questionnaire and an online 7-day daily sleep (morning) and mood (evening) diary. Results: Daily fluctuations in college students' reports of restedness (morning diary) mediated the association between the nighttime presence of noise disturbances (morning diary) and depressive and anxiety symptoms (evening diary). Conclusions: Given the high prevalence of mental health problems in college students, creating more conducive sleep environments may help to prevent depressive and anxiety symptoms in this population.

Equal Benefits? An Examination of the Potential Consequences of Later School Start Times for Adolescents and Their Mental Health.

BACKGROUND: Given the documented benefits of later school start times on adolescents' mental health, the aim of the current study was to examine if the association between school start times and depressive symptoms differed across adolescents from families of different socioeconomic status levels. METHODS: Using a cross-sectional design, the current study incorporated an online survey for high school students and their parents across the United States, with average sleep duration measured through a 7-day sleep diary. A total of 193 adolescent (Meanage  = 15.7 years old, SD = .94; 54.4% female; 71% white) and parent (Meanage  = 47.6 years old, SD = 5.4; 80% female; 79% white) dyads participated. Adolescents reported on depressive symptoms, sleep quality and duration, chronotype, and demographic covariates; parents reported on school start times and socioeconomic status. RESULTS: Results suggested that only in adolescents from higher socioeconomic status families (+1 SD) did the association between later start times and fewer depressive symptoms emerge as significant. CONCLUSIONS: Although more school start times research is needed to understand its impact across diverse groups of students, current findings suggest a disproportionate benefit of reduced depression for youth from families of higher socioeconomic status with having a later start time.

Shocks to the system: The influence of COVID-19-related stressors on coparental and family functioning.

In addition to the fears associated with contracting COVID-19, the pandemic has forced families across the United States to quickly transition to new patterns of living. These transitions present new stressors, including health-related concerns, new demands placed on families by lockdowns and stay-at-home orders, and the possibility of losing a job or inability to pay bills. Such stressors have the potential to disrupt collaboration between coparents in addition to basic family functioning. Drawing upon a family systems perspective, the current study thus sought to examine links between COVID-19-related stressors and family cohesion through coparental functioning. A total of 1,003 parent/caregivers (97% from the United States; 82% Caucasian, 74% female; M = 40.9 years old, SD = 8.5; Mincome = $83,631, SDincome = $36,320) of school-age children completed an initial online survey from the end of March to the end of April of 2020. Of the initial sample, a total of 685 parents/caregivers completed weekly diaries for a month. Based on multilevel modeling, results suggested that, at the between-family level, coparental conflict mediated the impact of the stress of parenting/work demands and financial stress on family cohesion. At the within-family level, weekly spikes in health-related stress were associated with corresponding spikes in coparental conflict, which, in turn, were associated with drops in family cohesion. Results from the current study suggest that beyond the fears associated with contracting the COVID-19 virus, other key stressors associated with the emerging pandemic played a role in increasing coparental conflict, ultimately exacerbating family functioning. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Daytime sleepiness underlies the link between adverse parenting and youth psychopathology among adolescent girls.

INTRODUCTION: Adverse parenting is associated with sleep problems in adolescence, including sleep quality, inadequate sleep, and daytime sleepiness. Adolescents who experience sleep problems are at greater risk for developing internalizing and externalizing problems. However, research on the intervening role of sleep in the link between adverse parenting and youth psychopathology remains limited. The present study aimed to examine the indirect effects of adverse parenting on youth internalizing and externalizing psychopathology via sleep problems, and to examine the moderating role of gender in associations between parenting and sleep. METHODS: Participants were 101 low-income youth aged 9-12 (52.5% female; 75.2% African-American) and their primary caregivers. Families were from a non-metropolitan region in the Southeastern United States. Data were collected at two time points (T1; Mage = 10.28, SD = 1.2; T2; Mage = 12.08, SD = 1.2). Adverse parenting was measured at T1, youth-reported sleep problems (inadequacy, disturbance) and daytime sleepiness were assessed at T2, and parent-reported internalizing and externalizing symptoms were measured at T2. RESULTS: Daytime sleepiness served as an intervening variable in associations between adverse parenting and internalizing and externalizing problems, but sleep problems did not. This indirect association was moderated by gender, such that the association between adverse parenting and daytime sleepiness only emerged as significant for girls. CONCLUSIONS: These findings suggest that daytime-related sleep behaviors may serve as a mechanism through which harsh or neglectful parenting is related to internalizing and externalizing psychopathology in adolescence, particularly for adolescent girls.

The role of financial strain in college students' work hours, sleep, and mental health.

OBJECTIVE: To examine poor sleep quality as a potential mediator between college students' employment hours and depressive symptoms, and to examine if this mediation model might differ across students reporting different levels of financial strain. Participants: The sample was collected through a multi-site study during the Spring of 2019 and included 792 undergraduates (M = 20.1, SD = 1.9) in Upstate New York. Methods: Moderated mediation analyses based on cross-sectional self-report, online questionnaires. Results: Increased work hours predicted greater sleep disturbance, which, in turn, predicted more depressive symptoms. Compared to students in more comfortable financial situations, this mediation model only emerged for students reporting more financial strain and lower family socio-economic status. Conclusions: Student employment hours are a significant predictor of students' mental well-being when considering their potential impact on their sleep. Furthermore, students reporting higher levels of financial stress are most at risk of being impacted by this process.

Mediators of the association between COVID-19-related stressors and parents' psychological flexibility and inflexibility: The roles of perceived sleep quality and energy.

BACKGROUND: The COVID-19 pandemic has forced parents across the United States to quickly transition to a new way of living. These transitions present new stressors, including the stress associated with physical health, with the demands of social distancing placed on families, and with the possibility of losing a job or not being able to pay bills. Such stressors have the potential to disrupt basic functioning, such as sleep and daily energy levels. Furthermore, the impact of stress might have repercussions on parents' capacities to be psychologically flexible, thus putting their psychological functioning at risk. Drawing upon a contextual behavioral science perspective, the current study sought to examine links between COVID-19-related stressors and psychological flexibility/inflexibility through such basic processes as parents' perceived sleep quality and daily energy level. METHODS: A total of 1003 parents (97% from the US; 74% female; M = 40.9 years old, SD = 8.5) of children (ages 5-18) completed an online survey from the end of March to the end of April of 2020. RESULTS: Path analyses suggested that, after controlling health-related stress and the stress of work and parenting demands due to the pandemic directly predicting greater inflexibility and lower inflexibility, two mediation paths emerged. Specifically, higher levels of health-related stress were associated with lower levels of energy, which, in turn predicted lower levels of psychological flexibility. In addition, higher levels of health-related stress were associated with lower perceived sleep quality, which, in turn, was associated with higher levels of psychological inflexibility. In secondary analyses on the specific dimensions of flexibility and inflexibility, results suggested that lower energy levels indirectly linked health-related stress to lower levels of all 6 dimensions of flexibility and poorer sleep quality indirectly linked health-related stress to higher levels of self-as-content, fusion, and inaction. CONCLUSIONS: The stressors associated with COVID-19 pandemic have the potential to disrupt parents' perceived sleep quality and daily energy levels, reducing their abilities to respond to difficult or challenging experiences in a flexible manner and instead promoting more reactive and inflexible responses.

Psychological flexibility and inflexibility as sources of resiliency and risk during a pandemic: Modeling the cascade of COVID-19 stress on family systems with a contextual behavioral science lens.

BACKGROUND: The coronavirus disease (COVID-19) pandemic and the historic economic shutdown and stay-at-home efforts to slow its spread have radically impacted the lives of families across the world, completely disrupting routines and challenging them to adjust to new health risks as well as to new work and family demands. The current study applied a contextual behavioral science lens to the spillover hypothesis of Family Systems Theory to develop a multi-stage mechanistic model for how COVID-19 stress could impact family and child functioning and how parents' psychological flexibility could shape those processes. METHODS: A total of 742 coparents (71% female; 84% Caucasian, 85% married, M = 41 years old) of children (ages 5-18, M = 9.4 years old, 50% male) completed an online survey from March 27th to the end of April 2020. RESULTS: Path analyses highlighted robust links from parent inflexibility to all components of the model, predicting: greater COVID-19 stress, greater coparenting discord and family discord, greater caustic parenting, and greater parent and child distress. Parent flexibility was associated with greater family cohesion, lower family discord and greater use of constructive parenting strategies (inductive, democratic/autonomy supportive, positive). Results further suggested that COVID-19 stressors predicted greater family and coparent discord, which in turn predicted greater use of caustic parenting (reactive, inconsistent, aggressive), which in turn predicted greater child and parent distress. CONCLUSIONS: The current results highlight parental flexibility and inflexibility as key points of intervention for helping families navigate the current global health crisis, highlighting the crucial role they play in the lives of families.

Parents still matter: the influence of parental enforcement of bedtime on adolescents' depressive symptoms.

STUDY OBJECTIVES: The aim of the current study was to test a multilevel mediation model that examined how adolescent sleep duration might be linked to depressive symptoms via their daytime energy levels. Furthermore, the study examined how parents' enforcement of various types of bedtime rules predicted the duration of adolescent sleep. METHODS: A total of 193 adolescent (ages 14-17; Mage = 15.7 years old, SD = .94; 54.4% female; 71% Caucasian) and parent dyads completed baseline, online surveys, and adolescents also completed online 7-day, twice-daily (i.e. morning and evening) reports of their sleep duration (morning diary) and their energy levels and depressive symptoms throughout the day (evening diary). Parents (Mage = 47.6 years old, SD = 5.4; 80% female) completed assessments of enforcement of bedtime-related rules (i.e. bedtime, cessation of electronic media usage, prohibiting afternoon/evening caffeine consumption). Multilevel modeling enabled the testing of the mediation model both at the between-person level and within individuals. RESULTS: Results suggested that adolescents' energy levels mediated the association between adolescents' sleep duration and depressive symptoms. Furthermore, both greater enforcement of bedtimes and later school start times predicted longer sleep durations for adolescents, and were indirectly associated with adolescents' depressive symptoms. CONCLUSIONS: These findings underscore the importance of adolescents obtaining sufficient sleep to support their mental health and suggest a critical point of intervention for preventing or decreasing insufficient sleep. Given the diverse threats to adolescents' sleep as well as adolescents' desire for greater independence, collaborative, autonomy-promoting bedtime limit-setting is recommended to support adolescents' well-being.

The Moderating Role of Parents' Dysfunctional Sleep-Related Beliefs Among Associations Between Adolescents' Pre-Bedtime Conflict, Sleep Quality, and Their Mental Health.

STUDY OBJECTIVES: The current study's aim was to examine the indirect effect of parent-child pre-bedtime arguing about the bedtime process on adolescents' symptoms of anxiety and depression via the mediating role of adolescents' sleep quality. In addition, this study sought to test this mediation model across different levels of both parents' and children's dysfunctional sleep-related beliefs (ie, moderated mediation). METHODS: A total of 193 adolescent (mean age = 15.7 years, standard deviation [SD] = .94; 54.4% female) and parent dyads completed both baseline, online surveys, and online 7-day, twice-daily sleep diaries. Parents (mean age = 47.6 years, SD = 5.4; 80% female) reported daily for 7 days on the intensity of any conflict regarding the adolescents' bedtime process, and adolescents completed daily reports of their sleep duration and quality (morning diary) and their anxiety and depressive symptoms (evening diary). RESULTS: Results suggested that adolescent sleep quality mediated the indirect association between parent-child pre-bedtime arguing and adolescents' anxiety and depressive symptoms. Furthermore, this mediation model was moderated by parents' dysfunctional sleep-related beliefs. Only in families with parents reporting either average or above-average (+1 SD) levels of dysfunctional beliefs did this mediation model emerge as significant. CONCLUSIONS: Results provide further evidence for the essential role of the family environment in adolescent sleep and well-being, and they suggest that parents' dysfunctional sleep-related cognitions put adolescents at risk for a negative cascade stemming from arguing over bedtime to poor-quality sleep and its negative consequences on their mental health.

Adolescent sleep quality mediates family chaos and adolescent mental health: A daily diary-based study.

The aim of the current study was to examine adolescents' sleep duration and quality as potential mediators of the association between chaotic and disorganized family environments and adolescent anxiety and depressive symptoms. A total of 193 adolescent (ages 14-17; Mage = 15.7 years old, SD = .94; 54.4% female; 71% White) and parent dyads completed baseline, online surveys, and adolescents also completed online 7-day, twice-daily sleep diaries. Parents (Mage = 47.6 years old, SD = 5.4; 80% female) reported on levels of family chaos, socioeconomic status (SES), and school start times, whereas adolescents completed daily reports of their sleep duration and quality (morning diary) and their anxiety and depressive symptoms (evening diary). At the within-person level, daily fluctuations in both sleep duration and quality were significantly linked to corresponding daily fluctuations in anxiety and depressive symptoms. At the between-person level, adjusting for parenting quality; adolescents' age, gender, daytime napping, school start time; and the family's SES, we found that adolescent sleep quality mediated the association between family chaos and disorganization and symptoms of anxiety and depression. The current study illuminates the potential influence that family chaos and disorganization play in adolescents' sleep and mental health symptomatology and underscores the need to assess the family context to support better adolescent health and well-being. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Transactions within the family: Coparenting mediates associations between parents' relationship satisfaction and the parent-child relationship.

In the current study, we examined the potential for transactional relations among parents' marital satisfaction, coparental cooperation and conflict, and parent-child relationship satisfaction in a sample of 249 families with 2-3-year-old children. Using a novel multiwave design with frequent assessments to better capture transactional family processes, mothers and fathers were assessed across 5 waves with 2-month lags; mean age of the target children (53% girls) was 2.8 years (SD = 0.62) at baseline. Cross-lagged, multilevel structural equation modeling (SEM) analyses using an actor-partner interdependence modeling framework revealed coparental cooperation and conflict as likely mechanisms within the family system. Specifically, marital satisfaction from both parents was reciprocally linked to fathers' coparental cooperation over time, supporting transactional links between those two family subsystems. In addition, there were significant transactional links between both mothers' and fathers' coparental cooperation and father-reported parent-child relationship satisfaction across time, revealing within-parent and cross-parent mediation. Regarding coparental conflict, marital satisfaction from both parents was reciprocally linked to the same parents' reports of coparental conflict across time (i.e., actor effects). Furthermore, father-reported coparental conflict acted as a mediating or intervening mechanism between father-reported marital satisfaction and mother-reported parent-child relationship satisfaction (cross-parent mediation). Taken as a set, the findings supported coparental cooperation and conflict as significant links between marital functioning and the parent-child relationship. Findings build on a growing body of literature addressing the transactional associations embedded within the family system and highlight the importance of modeling the inherent interdependencies between mothers' and fathers' reports of family functioning. (PsycINFO Database Record

A process-oriented model linking adolescents' sleep hygiene and psychological functioning: the moderating role of school start times.

OBJECTIVE: To examine a mediational model linking sleep hygiene to better mental health in adolescents via the mechanism of improved sleep quality, and to test the moderating role of school start times (SST) (before 8:30 AM vs. 8:30 AM or later) on that mediation model. DESIGN: Cross-sectional. SETTING: Online survey for high school students across the United States. PARTICIPANTS: A total of 197 adolescents aged 14-17 years old (Mage = 15.6 years, SD = 1.8; 53% female) completed a baseline survey and 7-day sleep diaries; their parents (Mage = 47.7 years, SD = 5.5; 79% female) reported on family socioeconomic status and high SST. MEASUREMENT: Adolescents reported on their sleep hygiene, circadian chronotype, daily levels of sleep quality and duration (morning diaries) and their depressive/anxiety symptoms (evening diaries) for 7 days. RESULTS: A moderated-mediation model suggested that baseline sleep hygiene was directly associated with lower average daily depressive/anxiety symptoms across all students, but that association was marginally stronger in students with later SST (8:30 AM or later). A mediated path emerged only for students with earlier start times, suggesting that, for those students, baseline sleep hygiene was indirectly associated with lower average daily psychological symptoms by improving average daily sleep quality. CONCLUSIONS: The current study is one of the first to demonstrate that SST might serve as a critical moderator in models of adolescent sleep and daily functioning. The findings provide additional evidence in the debate on how SST may affect adolescent health.

Reciprocal influences among family processes and toddlers' sleep problems.

The current study examined bidirectional relations between children's sleep problems and parents' relationship satisfaction, coparental cooperation, and global family functioning in a sample of 249 families with 2-3-year-old children. Mothers and fathers were assessed across 5 waves with 2-month lags; the target children (53% female) were 2.8 years old (SD = .62) at baseline. Results of lagged path analyses indicated that children's sleep problems were reciprocally related to lower relationship satisfaction for mothers after accounting for covariates; however, for fathers, only relationship satisfaction predicted residual decreases in children's sleep problems 2 months later. Coparental cooperation also demonstrated reciprocal predictive links with fewer children's sleep problems in mothers; no such effect was found for fathers. Finally, for fathers, family functioning predicted residual decreases in children's sleep problems 2 months later across the 5 waves of the study. Findings build on a growing body of literature addressing reciprocal links between toddlers' sleep problems and adaptive family processes and highlight the importance of examining children's sleep within the context of the larger family system. (PsycINFO Database Record

The indirect effects of sleep hygiene and environmental factors on depressive symptoms in college students.

OBJECTIVE: Because of the interrelation of sleep disturbance and depression in college students, sleeping environments and sleep hygiene practices have emerged as potential avenues for intervention. To understand associations between predictors of sleep (environmental noise disturbances, pre-bedtime media use, sleep hygiene), poor sleep quality, and depressive symptoms, this study examined poor sleep quality as a potential mediator between these predictors and depressive symptoms. DESIGN: Cross-sectional. SETTING: Residential colleges/universities. PARTICIPANTS: The sample was collected during the spring of 2015 and was comprised of 335 college students (mean age = 19.9 years, SD = 1.9), including both students living with roommates and students living alone. MEASUREMENT: A multiple-group path analysis was conducted based on self-report and online questionnaires. RESULTS: Environmental noise disturbances and emotionally -related sleep hygiene practices were indirectly associated with higher depressive symptoms across students living either with or without roommates. Furthermore, students living alone evidenced an indirect association between cognitively-related sleep hygiene practices and depressive symptoms, whereas students living with roommates evidenced indirect associations between both physiologically and environmentally-related sleep hygiene practices and depressive symptoms. CONCLUSIONS: Sleep hygiene and environmental factors may be potential avenues for preventing depressive symptoms in college students.