Are Babies Sensitive to the Context of Acute Pain Episodes? Infant Distress and Maternal Soothing During Immunization Routines at 3 and 5 Months of Age. Infant and Child Development, 14:51-62

Ninety-three healthy full-term Italian infants were observed longitudinally at 3 and 5 months during routine vaccinations. Mothers’ behaviour was also observed. Participants were divided into two cohorts depending on procedure of inoculation (the first cohort, n=44, showed more distress; the second cohort, n=49, showed less distress). Results indicate that babies’ different levels of behavioural distress correspond to mothers’ different soothing strategies. Maternal proximal soothing at 3 months predicts faster infant quieting at 5 months, but concurrent and predictive effects of maternal proximity are apparent only when level of baby distress is not too high. The study confirms the view that young babies are sensitive to the overall context of acute pain episodes, including medical procedure and maternal soothing.