Day-to-Day Relations Between ADHD and Internalizing Symptoms in College Students: An Intensive Time-Series Investigation

This study examined daily relationships between ADHD symptoms and depression/anxiety in 151 college students over 28 days using ecological momentary assessment. Findings revealed bidirectional temporal associations, such as difficulty unwinding predicting next-day anxiety and concentration difficulties predicting next-day depression, suggesting mechanisms underlying ADHD-internalizing comorbidity.