The development of noun definitions: a metalinguistic analysis.

Defining is a metalinguistic skill. This study charts the development of the ability to define. A total of 120 participants (40 at each of the ages of 10, 14 and 18 years) defined eight concrete and eight abstract nouns. Each definition was coded to identify the types of responses present in it. Results indicate that there are significant differences in the way concrete and abstract nouns are defined. All three age-groups defined concrete nouns mainly by class and characteristic responses. But it was not until age 18 that abstract nouns were defined by class and characteristic responses. The development of abstract noun definitions follows the development of concrete noun definitions. The ability to define is dependent upon knowledge of the meaning of the word but it is also dependent upon implicit or explicit knowledge of the definitional form. The ability to define abstract nouns is a late developing metalinguistic skill.