1. Antisocial stage (0-8 weeks): Babies bond towards non-human objects and humans in a similar way
2. Indiscriminate attachment (2-7 months): Babies show some preference for familiar adults, are happier in the presence of other humans
3. Specific attachment (7-12 months): Babies start to display classic signs of attachment towards a particular person, usually the one that offers more interaction
4. Multiple attachments (1 year onwards): Babies show attachment behaviours towards multiple people, secondary attachments can form within a month of the primary attachment