Crossing boundaries: more evidence for phonological constraints on early multi-word utterances

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Abstract
A number of researchers have argued that phonological constraints may influence the emergence and form of combinatorial speech in children. Donahue (1986) presented evidence that one child's consonant harmony constraint operated across word boundaries. This paper presents further evidence for the operation of word-level phonological constraints in multi-word utterances. Selection and avoidance patterns as well as her modifications of adult forms indicate the presence of a syllable sequencing constraint in this child's grammar: an initial syllable must begin with a consonant whose sonority value is not less than that of the following syllable. The same constraint governs the form of her early word combinations. The existence of evidence for the operation of word-level constraints in word combinations, it is pointed out, has consequences for how we interpret two-lexicon models of phonological development.