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Layton, Thomas L.; Stick, Sheldon L. – Journal of Child Language, 1979
Ten objects were used to assess comprehension, production, and imitation of comparative and superlative suffixes in 100 children ranging in age from two years, six months, to four years, six months. (Author/AM)
Descriptors: Adjectives, Adverbs, Age, Child Language

Prawat, Richard S.; Hanes, Bailey F. – Child Study Journal, 1978
Descriptors: Age, Cognitive Development, Comprehension, Conservation (Concept)