Studies babies in Glasgow every month for the first year of their life and then at 18 months.
They collected data on attachment through considering two types of data: Separation Anxiety and Stranger Distress.
Separation Anxiety
if they infant showed anxiety or distress when the care giver left, indicted that the infant has formed an attachment to the caregiver.
Pre-Attachment (0-6weeks)
From a very early stage, babies enjoy the company of other people and prefer humans over objects and other non-human things. However, the baby is not able to tell the difference between different human faces.
Indiscriminate Attachment (6weeks–6months)
the baby can tell the difference between different human faces and starts to prefer familiar ones. However, the baby does not mind unfamiliar faces and will allow a stranger to handle them without getting upset.
Specific Attachment (7 months)
From about 7 months, the baby’s attachment to its primary caregiver (e.g. its mother) is particularly strong. The baby demonstrates separation anxiety (distress from being away from its primary caregiver) and a fear of strangers.
Multiple Attachments (10+ months)
After around 9 or 10 months, the infant will begin forming attachments to other familiar faces, such as grandparents and other children. However, the strongest emotional attachment is with the primary caregiver (usually the mother).
