CONCLUSIONS: Symptom measurement at age 2 may be useful for identifying toddlers at higher risk for later behavioral challenges, with implications for early screening. Future work in this area can help delineate boundaries of developmental typicality versus atypicality, evaluate the specificity of early symptom elevations to longer-term outcomes, and identify patterns of symptom stability from the toddler period over time that may aid in identifying children at greatest risk for…
