Some possible causes of children's early word overextensions

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Abstract
One child's lexical development was followed from 1; 1 to 1; 7 to look for possible causes of early word overextensions. Lexical acquisition was observed for comprehension and production through the use of a parental diary and systematic language sampling. In addition, 16 nonsense words were taught in 10 experimental sessions over a two-month period to control for phonological effects. The results isolated six distinct factors behind early word overextensions. It is concluded that overextensions should not constitute the primary data for the construction of theories of semantic acquisition.