Early-life trajectories of dyadic synchrony among infants developing autism or concerns for ADHD.
This study followed infants at elevated and average likelihood for autism or ADHD (n = 163) from 6-36 months, classifying them into 36-month outcome groups: Autism (n = 28), ADHD Concerns (n = 20), or Comparison (n = 115). The sample was predominantly male, White, and non-Hispanic. Between 2013 and 2019, caregiver-chil...