A developmental psychologist observes a group of three-year-old children over six months. She records instances of children's spoken language, paying particular attention to errors in verb tense.
She notes that children who previously used correct irregular past tenses (e.g., "went," "ran") begin producing incorrect but rule-governed forms (e.g., "goed," "runned") after a period of exposure to regular past-tense verbs. The psychologist does not manipulate any variables; she records language as it naturally occurs.
Which of the following best describes the language errors the children are making?
Telegraphic speech
Overgeneralization
Babbling
Overextension
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