Underextension

扩展不足

A term used in language acquisition studies to refer to one type of relationship between adult and child meaning, as expressed in lexical items. In underextension the child’s lexical item has a narrower range of application than the equivalent term in adult language, e.g. when cat is used to refer to one specific cat or one type of cat, and not all.

语言习得研究使用的术语，指在词项上表现的成人和儿童之间的一类意义关系。扩展不足是儿童某一词项的应用范围比成人语言对当词项的应用范围窄。例如cat“猫”只用来指一只特定的猫。