Within the first few days of life an infant can show preference for a caregiver.
- By 1 month, infants know what characteristics (voice, touch) go with each caregiver.
- By 3 months, infants can even show preferences for certain voices.
- By 4 months, infants begin to form expectations of what their caregivers will be like — will they be gentle, will they be attentive, or will they be upsetting?
This means that babies can form attachments with more than one caregiver, but may have different expectations for each caregiver.