Hannah uses the word cat to refer only to her cat, not to other cats. Hannah's mistake is an example of
A) fast mapping.
B) overregularization.
C) overextension.
D) underextension.

Question

Quizplus · Accepted Answer

Hannah's mistake is an example of underextension, where a child uses a word too narrowly, applying it to fewer objects or situations than is appropriate for the language. In this case, Hannah is using the word "cat" to refer only to her own cat, rather than to all cats, which is a classic example of underextension.

Hannah Uses the Word Cat to Refer Only to Her