Field (1978) - Fathers as primary caregivers
Evidence suggests that when fathers take on the role of primary caregivers they adopt to behaviour more typical of mothers.
Field filmed 4-month old babies in face-to-face interactions with primary caregiver mothers, secondary caregiver fathers and primary caregiver fathers.
Primary caregiver fathers, like mothers, spend more time smiling, imitating and holding infants than secondary caregiver fathers.
This shows that fathers can be the more nurturing attachment figure.