Linear Mixed-Model Analysis to Examine Longitudinal Trajectories in Vocabulary Depth and Breadth in Children Who Are Hard of Hearing

Autor/inn/en	Walker, Elizabeth A.; Redfern, Alexandra; Oleson, Jacob J.
Titel	Linear Mixed-Model Analysis to Examine Longitudinal Trajectories in Vocabulary Depth and Breadth in Children Who Are Hard of Hearing
Quelle	In: Journal of Speech, Language, and Hearing Research, 62 (2019) 3, S.525-542 (18 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Hearing Impairments; Longitudinal Studies; Vocabulary Development; Standardized Tests; Age Differences; Comparative Analysis; Mothers; Educational Attainment; At Risk Persons; Delayed Speech; Elementary School Students; Measures (Individuals) + Suchen Sie Ihr Suchwort? Hearing impairment; Hörbehinderung; Longitudinal study; Longitudinal method; Longitudinal methods; Längsschnittuntersuchung; Wortschatzarbeit; Standadised tests; Standardisierter Test; Age; Difference; Age difference; Altersunterschied; Mother; Mutter; Bildungsabschluss; Bildungsgut; Risikogruppe; Sprachverzögerung; Messdaten
Abstract	Purpose: Children who are hard of hearing (CHH) tend to have reduced vocabularies compared to children with normal hearing (CNH). Prior research on vocabulary skills in children with hearing loss has focused primarily on their breadth of knowledge (how many words are known). Depth of vocabulary knowledge (how well words are known) is not well documented for CHH. The current study used linear mixed models (LMMs) to investigate growth trajectories of vocabulary depth and breadth in CHH relative to age-matched CNH. Method: Participants for this study included 155 children (93 CHH, 62 CNH) enrolled in a longitudinal study. Examiners administered a standardized measure of vocabulary knowledge at ages 7, 8, and 9 years. We constructed multiple LMMs with fixed effects for group and age. The models included various combinations of random intercepts for subject and item and random slope for age. Results: For depth, CHH showed significant and stable deficits compared to CNH over time. For breadth, CNH showed greater vocabulary breadth, but the group differences diminished with age. For CHH, higher aided audibility, age, and maternal educational level were associated with greater vocabulary breadth and depth. Age at hearing aid fitting was not. Conclusions: A major advantage of using LMM is that it allowed us to cope with missing data points while still accounting for variability within and across participants. Assessment of both vocabulary breadth and depth may be useful in identifying school-age CHH who are at risk of delays in language outcomes. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01