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- Title
Input Subject Diversity Accelerates the Growth of Tense and Agreement: Indirect Benefits From a Parent-Implemented Intervention.
- Authors
Hadley, Pamela A.; Rispoli, Matthew; Holt, Janet K.
- Abstract
Purpose: This follow-up study examined whether a parent intervention that increased the diversity of lexical noun phrase subjects in parent input and accelerated children's sentence diversity (Hadley et al., 2017) had indirect benefits on tense/agreement (T/A) morphemes in parent input and children's spontaneous speech. Method: Differences in input variables related to T/A marking were compared for parents who received toy talk instruction and a quasi-control group: input informativeness and full is declaratives. Language growth on tense agreement productivity (TAP) was modeled for 38 children from language samples obtained at 21, 24, 27, and 30 months. Parent input properties following instruction and children's growth in lexical diversity and sentence diversity were examined as predictors of TAP growth. Results: Instruction increased parent use of full is declaratives (ηp ² ≥ .25) but not input informativeness. Children's sentence diversity was also a significant time-varying predictor of TAP growth. Two input variables, lexical noun phrase subject diversity and full is declaratives, were also significant predictors, even after controlling for children's sentence diversity. Conclusions: These findings establish a link between children's sentence diversity and the development of T/A morphemes and provide evidence about characteristics of input that facilitate growth in this grammatical system.
- Subjects
CHAMPAIGN County (Ill.); ILLINOIS; NOUN phrases (Grammar); LINGUISTIC input; PARENT-child relationships; TENSE (Grammar); AGREEMENT (Grammar); LEXICOLOGY; SENTENCES (Grammar); ANALYSIS of variance; CHI-squared test; CONFIDENCE intervals; COMPARATIVE grammar; QUESTIONNAIRES; RESEARCH funding; STATISTICAL hypothesis testing; STATISTICS; PARENT attitudes; REPEATED measures design; DATA analysis software; DESCRIPTIVE statistics
- Publication
Journal of Speech, Language & Hearing Research, 2017, Vol 60, Issue 9, p2619
- ISSN
1092-4388
- Publication type
Article
- DOI
10.1044/2017_JSLHR-L-17-0008