“…However, this finding of less reactivity in children whose mothers used illicit drugs while pregnant has not been consistently replicated across studies. Specifically, toddlers whose mothers used illicit drugs (mainly cocaine, marijuana, and amphetamine) during pregnancy displayed more negative reactivity during emotionally distressful situations (e.g., “still‐face” procedure, arm restraint task) and were rated as more negatively reactive (e.g., difficult) by their mothers than toddlers whose mothers did not use drugs during pregnancy (e.g., Kirlic et al, 2013; Metosky & Vondra, 1995). Of note, during early childhood, child negative reactivity in response to stressors is typically adaptive and normative at appropriate levels (Razza, Martin, & Brooks‐Gunn, 2012).…”