Abstract and Keywords
Children acquire some derived word forms early, initially as unanalyzed wholes. But from about age 2 onwards, they start to make use of attested derived word-form patterns when they construct new words to convey specific meanings. These spontaneous coinages offer one source of evidence for children’s identification of affixes and their meanings. Two further sources are elicited interpretations of novel words never heard before, and elicited coinages to express novel meanings. All three have been studied extensively for a number of languages. Children’s acquisition of derived word-forms depends on their ability to identify core stems and affixes, on the semantic transparency of the affixes (known meanings), and on productivity (forms well attested in adult speech). Order of acquisition for specific derivational meanings depends largely on adult productivity, and this varies with language typology.
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