Individual Differences in the Onset of Tense Marking: A Growth-Curve Analysis.
The purpose of this study was to explore individual differences in children's sense onset growth trajectories and to determine whether any within or between-child predictors could account for these differences. Twenty-two children with expressive vocabulary abilities in the low-average to below-aver...
| Published in: | Journal of Speech, Language & Hearing Research Vol. 49; no. 5; pp. 984 - 1001 |
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| Main Authors: | , |
| Format: | Article |
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American Speech-Language-Hearing Association
October 2006
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=507920027&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 507920027 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: October 2006 vid: 49 iid: 5 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 507920027 10.1044/1092-4388(2006/071) ppf: 984 ppct: 17 formats: fmt: – @attributes: type: T – @attributes: type: P size: 415KB tig: atl: Individual Differences in the Onset of Tense Marking: A Growth-Curve Analysis. aug: au: Hadley, Pamela A. Holt, Janet K. su: Child behavior Children with learning disabilities Preschool children Children's language Vocabulary English language Tense (Grammar) sug: subj: Child behavior Children with learning disabilities Preschool children Children's language Vocabulary English language Tense (Grammar) keyword: Vocabulary development ab: The purpose of this study was to explore individual differences in children's sense onset growth trajectories and to determine whether any within or between-child predictors could account for these differences. Twenty-two children with expressive vocabulary abilities in the low-average to below-average range participated. Sixteen children were at risk for specific language impairment (SU), and 6 children had low-average language abilities. Spontaneous language samples, obtained at 3-month intervals between 2;0 and 3;0, were analyzed to examine change in a cumulative productivity score for 5 tense morphemes: third person singular present, past tense, copula BE, auxiliary BE, and auxiliary DO. Hierarchical linear modeling was used to model intercept and linear growth at 30 months and quadratic growth overall. A growth model that included mean length of utterance trajectories (MW) and MLU growth better explained within-child productivity score growth trajectories than a parallel model with vocabulary and vocabulary growth. Significant linear growth in productivity scores remained even after a control for MLU was in place. When between-child predictors were added in the final conditional model, only positive family history approached statistical significance, improving the models overall estimation of the model's growth parameters. The findings support theoretical models of language acquisition that claim relative independence of tense marking from other more general aspects of vocabulary development and sentence length. The trends for family history are also consistent with proposals implicating faulty genetic mechanisms underlying developmental language disorders. Systematic use of familial risk data is recommended in future investigations risk for examining the relationship between late-talking children and children at risk for SU. Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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