between 25-32 weeks, 50% of babies showed separation anxiety to a particular adult and joy at reunion with that person and are most comforted by that person
this is specific attachment to a primary attachment figure
they display stranger anxiety at that time
attachment was to the caregiver who engaged in reciprocity the most
in 65%, the first specific attachment was to the mother
in 30%, the mother was the first joint object of attachment
in 3% the father was the first object of attachment but in 27% they were the joint first object
by 40 weeks, 80% had a specific attachment to a primary caregiver and 30% showed multiple attachments
by 18 months, 75% had formed an attachment with the father and it was shown by separation anxiety