ERIC Number: EJ951491
Record Type: Journal
Publication Date: 2011-Dec
Abstractor: As Provided
Literacy Outcomes of Children with Early Childhood Speech Sound Disorders: Impact of Endophenotypes
Lewis, Barbara A.; Avrich, Allison A.; Freebairn, Lisa A.; Hansen, Amy J.; Sucheston, Lara E.; Kuo, Iris; Taylor, H. Gerry; Iyengar, Sudha K.; Stein, Catherine M.
Journal of Speech, Language, and Hearing Research, v54 n6 p1628-1643 Dec 2011
Purpose: To demonstrate that early childhood speech sound disorders (SSD) and later school-age reading, written expression, and spelling skills are influenced by shared endophenotypes that may be in part genetic. Method: Children with SSD and their siblings were assessed at early childhood (ages 4-6 years) and followed at school age (7-12 years). The relationship of shared endophenotypes with early childhood SSD and school-age outcomes and the shared genetic influences on these outcomes were examined. Results: Structural equation modeling demonstrated that oral motor skills, phonological awareness, phonological memory, vocabulary, and speeded naming have varying influences on reading decoding, spelling, spoken language, and written expression at school age. Genetic linkage studies demonstrated linkage for reading, spelling, and written expression measures to regions on chromosomes 1, 3, 6, and 15 that were previously linked to oral motor skills, articulation, phonological memory, and vocabulary at early childhood testing. Conclusions: Endophenotypes predict school-age literacy outcomes over and above that predicted by clinical diagnoses of SSD or language impairment. Findings suggest that these shared endophenotypes and common genetic influences affect early childhood SSD and later school-age reading, spelling, spoken language, and written expression skills.
Descriptors: Spelling, Articulation (Speech), Structural Equation Models, Oral Language, Language Impairments, Phonological Awareness, Young Children, Genetics, Memory, Speech Impairments, Child Language, Reading Skills, Writing Skills, Speech Skills, Preadolescents, Elementary School Students, Psychomotor Skills, Phonology, Vocabulary, Decoding (Reading), Predictor Variables, Reading Achievement
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: firstname.lastname@example.org; Web site: http://jslhr.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: Elementary Education
Authoring Institution: N/A