Bowlby suggests that fathers can fill a role closely resembling that filled by a mother but this is uncommon.
According to Bowlby, a father is more likely to engage in physically active and novel play and is the child's preferred play companion.
Schaffer and Emerson (1964)
Found that majority of babies attached to mother first at around 7 months (father solely first in only 3% of cases, father joint first attachment with mother in 27% of cases)
Additional attachments developed in the proceeding months (4th stage) to secondary attachments including the father.
In 75% of infants studied, by 18months, they had formed an attachment to the father (babies protested when father’s walked away, indicating attachment)
Field (1978)
Compared the behaviours of primary caregiver mothers with primary + secondary caregiver fathers.
Face-to-face interactions were analysed from video footage with infants at 4 months of age.
Secondary caregiver fathers engaged more in game playing and held their infants less.
Primary caregiver fathers engaged in significantly more smiling, imitative grimaces, and imitative vocalizations and these were comparable with mothers’ behaviour
These behaviours are related to interactional synchrony and the formational of an emotional attachment (Isabella et al, 1989)