Murray & Trevarthen (1985) → 2-month-old infants first interacted with their mother via a video screen in real time. Then played a video of the mother so that she was not responding to the infant's facial and bodily gestures. Findings = the infant became distressed - they tried to attract their mother's attention, but when given no response, turned away. This shows that the infant is an active and intentional partner in the caregiver-infant interaction. This supports the notion that such behaviour are innate rather than learnt.