Abilities of 2-, 5-, and 7-year-old children to interpret, judge acceptability of, and produce class extensions were assessed. It was concluded that increasing ability to deal appropriately with class extensions is primarily due to general advances in language acquisition rather than to any development unique to the class-extension word-formation…

Four- to 10-year olds viewed pictures in which all or some individuals pictured were doing something to all or some objects pictured. Children indicated which sentences, using "all" or "each" to modify the subject or object, applied to the pictures. In choosing the applicable sentence, children showed little difficulty with…

Findings demonstrate that the function of receptive vocabulary is different from and more highly developed than the expressive vocabulary regardless of socio-economic level. (Authors)

Investigated overextensions in comprehension and production, using the preferential-looking model, in 99 children (ages 1;9 to 2;3) who were asked to find the referent that matched the label they were given in real and anomalous trials. Results confirm that overextensions in production are not diagnostic of children's underlying semantic…

This paper presents the case of a child who at age 3;3 showed a marked schism between two branches of language functioning; he had control of language as a system for expressing syntactic-semantic relations but not as a system of interpersonal communication. (CFM)