The relationship between phonology and lexicon in first language acquisition has been of interest for many researchers in the last years (for a review see ). Both perception and production studies have been conducted to investigate each of these areas. Among the speech production studies, phonological templates have been proposed as an account of how children acquire words. Phonological templates are child-specific word form patterns such as consonant harmony, which children frequently use. In projecting the phonological template onto adult word forms the child adapts new words to fit to his or her own preferred production pattern .
In the present study, we investigate phonological templates in spontaneous speech from 12 Swedish 18-month-old children. The phonological templates are also related to each child’s vocabulary size, based on the Swedish version of the McArthur-Bates Communicative Development Inventory (CDI) . The participants included four children with a vocabulary size above 100 words, three with a vocabulary size between 50 and 100 words and five children with a vocabulary size below 50 words. The tentative findings indicate that only those children with a vocabulary size above 100 words show phonological templates, pointing to a relationship between lexical and phonological development in speech production. The results are discussed in relation to the existence of phonological templates in general and to the increased probability of the occurrence of phonological templates in a specific window of vocabulary size.
 C. Stoel-Gammon, "Relationships between lexical and phonological development in young children," Journal of Child Language, vol. 38, pp. 1-34, 2011.
 M. M. Vihman, Phonological Development: The first two years, 2nd ed. Oxford: Wiley Blackwell, 2014.
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