Abstract
The purpose of this present study is to produce a vocabulary checklist for the early detection and therapy of children with speech development retardation in“counseling projects for 2-years-old children”in Sakaide, Kagawa Prefecture. Therefore, we carried out a questionnaire survey of the vocabulary in 2 years old. In this study, words were classified according to grammar categories, and adjectives, adjective verbs, and adverbs as modifiers were evaluated and discussed. Comparison of the number of the vocabulary between children aged 24 months and those aged 30 months showed a rapid increase with age. When the contents of modifiers were classified according to Nelson's grammar categories (1973) , the number of adjectives associated with“attributes”and“states”were also increased in 30 months. Concerning antonymous adjectives that mean properties, the children in 30 months had acquired both of the pair of antonyms (such as large-small) while those in 24 months had acquired only one of the antonyms. Therefore, when a vocabulary checklist of adjectives, adjective verbs, and adverbs is produced, (1) the variety of modifiers should be increased, and (2) antonyms in adjectives should be evaluated.
