2.1.1. Data Set
The Adolescent Brain Cognitive Development (ABCD) study is the largest
longitudinal study ongoing in the United States on brain development and
child mental health (Garavan et al., 2018). At baseline, 11,880
participants aged 9-10, and their families, were recruited through
schools. The ABCD study ensured that participants were representative of
the U.S. population with regard to gender, ethnicity, education, income
level, and living environment (Adolescent Brain Cognitive Development,
2024). The study has been designed to take place over 10 years, where
every year participants are tested on multimodal assessments such as
physical, social, emotional, environmental, behavioral, and neuroimaging
measures.