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Academic Paper

Title: Caregivers' Suffix Frequencies and Suffix Acquisition by Language Impaired, Late Talking, and Typically Developing Children
Author: Anne S. Warlaumont
Institution: University of Memphis
Author: Linda Jarmulowicz
Institution: University of Memphis
Linguistic Field: Language Acquisition
Abstract: Acquisition of regular inflectional suffixes is an integral part of grammatical development in English and delayed acquisition of certain inflectional suffixes is a hallmark of language impairment. We investigate the relationship between input frequency and grammatical suffix acquisition, analyzing 217 transcripts of mother–child (ages 1 ; 11–6 ; 9) conversations from the CHILDES database. Maternal suffix frequency correlates with previously reported rank orders of acquisition and with child suffix frequency. Percentages of children using a suffix are consistent with frequencies in caregiver speech. Although late talkers acquire suffixes later than typically developing children, order of acquisition is similar across populations. Furthermore, the third person singular and past tense verb suffixes, weaknesses for children with language impairment, are less frequent in caregiver speech than the plural noun suffix, a relative strength in language impairment. Similar findings hold across typical, SLI and late talker populations, suggesting that frequency plays a role in suffix acquisition.


This article appears IN Journal of Child Language Vol. 39, Issue 5, which you can READ on Cambridge's site or on LINGUIST .

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