Shaffer and Emersons research found that infants form multiple attachments around 10-11 months.
By the age of 18 months only 13% of infants had a single attachment.
By 18 months 13% of infants had 5 or more attachments.
Fathers have been shown to adopt a more play-mate role than mothers.
Schaffer & Emerson (1964) found that 75% of infants formed a significant attachment with their father by 18 months old.
Grossman (2002) conducted a longitudinal study of 44 families comparing the role of fathers’ & mothers’ contribution to their children's attachment experiences at 6, 10 and 16 years.
Grossman (2002) state that the quality of the attachment between infants and their fathers was based on the time they spent together.
Field (1978) studied face-to-face interactions through video footage with infants at 4 months of age.
Field (1978) found that fathers as primary caregivers acted in the same way as mothers as primary caregivers.