The YOUth study: Rationale, design, and study procedures.

Area of Science:

• Developmental Psychology
• Child Psychiatry
• Behavioral Science

Background:

• Child behavioral development exhibits significant individual differences.
• Interactions between biological, psychological, and environmental factors are crucial but poorly understood.
• Social competence and self-regulation are key developmental characteristics.

Purpose of the Study:

• To detail the design of the YOUth cohort study.
• To investigate the interplay of factors influencing social competence and self-regulation in children.
• To provide insights into the developmental trajectories of behavioral characteristics.

Main Methods:

• Longitudinal, population-based cohort study with repeated measurements.
• Inclusion of two distinct groups: YOUth Baby & Child (pregnant women, partners, children) and YOUth Child & Adolescent (8-10 year olds and parents).
• Follow-up of participants for a minimum of 6 years.

Main Results:

• The study design, population, and inclusion procedures are detailed.
• Determinants, intermediate neurocognitive measures, and outcomes are specified.
• Informed consent and participation procedures are outlined.

Conclusions:

• The YOUth cohort study provides a robust framework for understanding child behavioral development.
• Detailed methodology allows for comprehensive analysis of developmental influences.
• The study aims to enhance knowledge on social competence and self-regulation across childhood and adolescence.