When a caregiver responds appropriately to an infant, and the caregiver and the child's emotional states match?

When a caregiver responds appropriately to an infant, and the caregiver and the child's emotional states match, it is called interactional synchrony.

Interactional synchrony is synchronised behavior exchanged between a caretaker and an infant. For example, a caregiver may smile in response to an infant's laughter, and vice versa.

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