Differential associations between infant affective and cortisol responses during the Still Face paradigm among infants born very low birth weight versus full-term.

Highlights: [•] Infants born VLBW showed dysynchrony in affective and cortisol stress responses. [•] VLBW infants evidenced uncorrelated affective and cortisol responses to SF stressors. [•] Full-term infants showed significant associations between positive affect and cortisol responses across both SF stressors. [•] Affective and cortisol associations were different for VLBW versus full-term infants. [Copyright &y& Elsevier]