What language stimulation technique is a mother using when she expands her child's utterance?

The technique being described is expansion, which involves taking a child's spontaneous utterance and elaborating on it to create a more complex and grammatically correct sentence. For example, if a child says "dog run," the mother might respond with "Yes, the dog is running." This method not only models correct language use but also provides the child with richer linguistic input, helping them to learn and understand more advanced language structures and vocabulary.

Expansion is key in language development, as it reinforces the child's attempts at communication while simultaneously guiding them towards more sophisticated utterances. This technique encourages children to continue expressing themselves and to engage in more conversational exchanges, fostering their overall language skills.