Editorial: Studying child development in a changing world.

In this editorial, I reflect on the implications of social, technological and cultural change for children and young people. Whilst we have a reasonably good understanding of trends in certain aspects of child development (e.g.

Initiation and stability of self-harm in adolescence and early adulthood: investigating social and aetiological factors in twins.

Background: Almost one in five (18.8%) UK adolescents are estimated to self-harm and many young people initiate self-harm early (average age 13 years). Prevention of self-harm should be informed by knowledge about risk factors (e.

"A place where I have lost and made friends": A photovoice study on adolescents' perspectives on health in a new residential development area in Munich, Germany.

Worldwide, the number and proportion of people living in cities continue to grow. Building new districts creates opportunities for designing urban environments that promote the health of their residents from the get-go. In this study, we used the photovoice methodology to explore the perspectives of adolescents on health and well-being in a new urban development area in Munich, Germany.

Commentary: Using QbTest for monitoring pharmacological treatment response in ADHD - are we there yet?

Individuals with attention-deficit/hyperactivity disorder (ADHD) exhibit varied responses to pharmacological treatments (e.g. stimulants and non-stimulants).

Receipt of social services intervention in childhood, educational attainment and emergency hospital admissions: longitudinal analyses of national administrative health, social care, and education data in Wales, UK.

Background: Research consistently finds poorer health and educational outcomes for children who have experienced out-of-home care relative to the general population. Few studies have explored differences between those in care and those in receipt of intervention from social services but not in care. Children receiving social services interventions often experience Adverse Childhood Experiences (ACEs), and deprivation, which are known to negatively impact outcomes.

Modifiable protective factors for mental health resilience in the offspring of depressed parents: A high-risk longitudinal cohort spanning adolescence and adulthood.

Background: Several protective factors have been identified for mental health (MH) resilience in adolescent offspring of depressed parents. However, it is unclear if these effects persist into adulthood.

Methods: Depressed parents and their offspring ( = 188) from the Early Prediction of Adolescent Depression study were assessed four times (mean offspring ages 12.

Do Children Cause the Cognitive Stimulation they Receive? Modelling the Direction of Causality.

We tested the directionality of associations between children's early-life cognitive development and the cognitive stimulation that they received from their parents. Our sample included up to 15,314 children from the Twins Early Development Study (TEDS), who were born between 1994 and 1996 in England and Wales and assessed at ages 3 and 4 years on cognitive development and cognitive stimulation, including singing rhymes, reading books, and playing games. Using genetically informative cross-lagged models, we found consistent, bidirectional effects from cognitive development at age 3 to cognitive stimulation at age 4, and from cognitive stimulation at age 3 to cognitive development at age 4.

The unequal impacts of the COVID-19 pandemic on young adults' mental health. Predictors of vulnerability and resilience using longitudinal birth cohort data in the UK.

Introduction: Previous studies have demonstrated deteriorations in young adult mental health during the COVID-19 pandemic, but evidence suggests heterogeneity in the mental health impacts of the pandemic. We sought to identify factors which may predict changes in psychological distress and wellbeing during the COVID-19 pandemic in UK young adults.

Methods: A total of 2607 young adults from the Millennium Cohort Study were included.

Investigating the neurodevelopmental correlates of early adolescent-onset emotional problems.

Background: Emotional problems (EPs) increase sharply after mid-adolescence. Earlier EPs are associated with poorer long-term outcomes, and their underlying mechanisms may differ to later-onset EPs. Given an established relationship between ADHD, autism, and later depression, we aimed to examine associations between neurodevelopmental conditions and correlates and early adolescent-onset EPs.

Characteristics of children with a psychiatric disorder in 1999, 2004 and 2017: an analysis of the national child mental health surveys of England.

Background: While research has described the profile of children with poor mental health, little is known about whether this profile and their needs have changed over time. Our aim was to investigate whether levels of difficulties and functional impact faced by children with a psychiatric disorder have changed over time, and whether sociodemographic and family correlates have changed.

Methods: Samples were three national probability surveys undertaken in England in 1999, 2004 and 2017 including children aged 5-15 years.

Development of a school-based programme for mental health promotion and prevention among adolescents in Nepal and South Africa.

Introduction: Adolescence is a critical time for mental health promotion and prevention and establishing healthy behaviours. Implementing universal, school-based psychosocial interventions can improve short- and long-term health trajectories for adolescents. While these interventions may offer important opportunities for fostering skills and relationships, few school-based interventions have been developed for and tested in low- and middle-income countries (LMICs) where adolescent mental health needs may be significant and under-served.

Sex differences in attention-deficit hyperactivity disorder diagnosis and clinical care: a national study of population healthcare records in Wales.

Background: Population-based studies have observed sex biases in the diagnosis and treatment of attention-deficit hyperactivity disorder (ADHD). Females are less likely to be diagnosed or prescribed ADHD medication. This study uses national healthcare records, to investigate sex differences in diagnosis and clinical care in young people with ADHD, particularly regarding recognition and treatment of other mental health conditions.

Emotional problems across development: examining measurement invariance across childhood, adolescence and early adulthood.

Emotional problems (anxiety, depression) are prevalent in children, adolescents and young adults with varying ages at onset. Studying developmental changes in emotional problems requires repeated assessments using the same or equivalent measures. The parent-rated Strengths and Difficulties Questionnaire is commonly used to assess emotional problems in childhood and adolescence, but there is limited research about whether it captures a similar construct across these developmental periods.

An exploration into the causal relationships between educational attainment, intelligence, and wellbeing: an observational and two-sample Mendelian randomisation study.

Educational attainment is associated with a range of positive outcomes, yet its impact on wellbeing is unclear, and complicated by high correlations with intelligence. We use genetic and observational data to investigate for the first time, whether educational attainment and intelligence are causally and independently related to wellbeing. Results from our multivariable Mendelian randomisation demonstrated a positive causal impact of a genetic predisposition to higher educational attainment on wellbeing that remained after accounting for intelligence, and a negative impact of intelligence that was independent of educational attainment.

Mechanisms behind gender transformative approaches targeting adolescent pregnancy in low- and middle-income countries: a realist synthesis protocol.

Introduction: Adolescent pregnancy is defined as pregnancy at the age of 19 or below. Pregnancy and childbirth complications are the most significant cause of death among 15-19-year-old girls. Several studies have indicated that inequitable gender norms can increase the vulnerability of adolescent girls, including violence exposure, early marriage, and adolescent pregnancy.

An agenda for future research regarding the mental health of young people with care experience.

Young people who are currently or were previously in state care have consistently been found to have much higher rates of mental health and neurodevelopmental difficulties than the general youth population. While a number of high-quality reviews highlight what research has been undertaken in relation to the mental health of young people with care experience and the gaps in our knowledge and understanding, there is, until now, no consensus, so far as we aware, as to where our collective research efforts should be directed with this important group. Through a series of UK wide workshops, we undertook a consultative process to identify an agreed research agenda between those with lived experience of being in care ( = 15), practitioners, policy makers and researchers ( = 59), for future research regarding the mental health of young people with care experience, including those who are neurodiverse/have a neurodevelopmental difficulty.

Genetics of environmental sensitivity and its association with variations in emotional problems, autistic traits, and wellbeing.

Greater environmental sensitivity has been associated with increased risk of mental health problems, especially in response to stressors, and lower levels of subjective wellbeing. Conversely, sensitivity also correlates with lower risk of emotional problems in the absence of adversity, and in response to positive environmental influences. Additionally, sensitivity has been found to correlate positively with autistic traits.

Childhood correlates and young adult outcomes of trajectories of emotional problems from childhood to adolescence.

Background: Emotional problems, especially anxiety, have become increasingly common in recent generations. Few population-based studies have examined trajectories of emotional problems from early childhood to late adolescence or investigated differences in psychiatric and functional outcomes.

Methods: Using the Avon Longitudinal Study of Parents and Children (ALSPAC, = 8286, 50.

Exploring the cognitive development of children born to adolescent mothers in South Africa.

Unlabelled: This study explores the cognitive development of children born to adolescent mothers within South Africa compared to existing reference data, and explores development by child age bands to examine relative levels of development. Cross-sectional analyses present data from 954 adolescents (10-19 years) and their first-born children (0-68 months). All adolescents completed questionnaires relating to themselves and their children, and standardized child cognitive assessments (Mullen Scales of Early Learning) were undertaken.

Irritability in Youths: A Critical Integrative Review.

Irritability, defined as proneness to anger that may impair an individual's functioning, is common in youths. There has been a recent upsurge in relevant research. The authors combine systematic and narrative review approaches to integrate the latest clinical and translational findings and provide suggestions for addressing research gaps.

Fetal brain growth and infant autistic traits.

Background: Structural differences exist in the brains of autistic individuals. To date only a few studies have explored the relationship between fetal brain growth and later infant autistic traits, and some have used fetal head circumference (HC) as a proxy for brain development. These findings have been inconsistent.