What intervention technique is used when a clinician vocalizes a child's actions during play?

The correct answer is parallel talk, which involves the clinician describing or vocalizing what a child is doing as they play. This technique provides a running commentary on the child's actions, which helps to enhance the child's language development by modeling language and vocabulary in context. It allows children to hear descriptive language and encourages them to connect words to their activities, effectively supporting their expressive language skills.

In this scenario, the clinician's verbalization serves to not only enrich the child's language exposure but also makes the play experience more interactive and engaging. The child is able to relate the spoken words to their actions, which facilitates learning and encourages them to express their thoughts and feelings verbally as they play.

The other techniques listed have different focuses: the mand model typically involves prompting a child to request something they want, reauditorization refers to the clinician repeating or echoing what a child has said to validate their communication, and self-talk involves the clinician narrating their own actions to model language while engaging in an activity themselves. Each of these techniques serves distinct purposes in language development but does not match the specific intervention of vocalizing a child's actions during play like parallel talk does.