What do systematic reviews say?

Parental sensitivity · caregiver‐infant dyads

Infant social, emotional, cognitive and motor development Assessed when infant aged 4 months, using the BSID; higher scores indicate better development · caregiver‐infant dyads

Caregiver perception of infant (parents' perception of the degree of difficult temperament of the infant) Assessed at postintervention, 8 weeks after delivery; higher score indicates better outcome · caregiver‐infant dyads

Caregiver knowledge (related to infants' physical capacities, including reflexes and senses) Assessed at postintervention, using multiple choice factual questions; higher scores indicate better outcome · caregiver‐infant dyads