Reciprocity = Infant and caregiver match each other's responses
Interactional synchrony = Infant and caregiver reflect each other's actions and emotions in a coordinated manner
Stages of Attachment (Schaffer + Emerson 1964)
Asocial stage
0-2 moths
Infants respond to people and objects in the same way
still forming bonds
2. Indiscriminate attachment
4-7 months
Babies are happy to be cuddled by a stranger - they have not developed stranger anxiety at this stage
Babies in this stage enjoy the company of a range of people
3. Discriminate attachment
7-10 months
The baby now has a strong attachment to their primary caregiver
All the signs of attachment are present: separation anxiety, stranger anxiety, proximity-seeking behaviour + clinginess
4. multiple attachments
10-11 months onwards
Babies now have a range of secondary attachment figures with whom they have formed a bond grandparents, siblings, aunts and uncles, nursery worker etc.
strengths of the stages
strength
The stages follow a logical pattern and reflect most children's experience of attachment hence the theory has external validity
The stages of attachment have good application: they could be used to identify developmental delay or infant-caregiver bonding issues by healthcare professionals
limitations
Not all children will fit neatly into the stages: some children may bond quickly with a range of people while others may be slower so the theory lacks some reliability
It is notoriously difficult to measure and track infant behaviour: many aspects of attachment remain a mystery i.e. a baby cannot explain how they are feeling or give reasons for their actions