What term refers to the repetition of the last word, sound, or phrase that was heard?

Echolalia is the phenomenon characterized by the repetition of words, phrases, or sounds that an individual has just heard. This behavior can occur in various contexts, particularly in individuals with certain developmental conditions, such as autism spectrum disorder or during specific stages of language development in children. Echolalia can serve various functions, including communication and understanding, as well as expressing emotions or reactions.

In contrast, perseveration refers to the persistent repetition of a particular response or behavior beyond the appropriate context, which is often seen in neurological conditions or cognitive impairments. Stuttering involves disruptions in the flow of speech, affecting the rhythm and pace, but does not involve the repetition of previous sounds or phrases. Language delay refers to a lag in the development of language skills but does not specifically pertain to the repetition of words that have just been heard. Thus, echolalia best describes the behavior of repeating the last word, sound, or phrase that was heard.