The Language Phenotype of a Small Geographically Isolated Russian-Speaking Population: Implications for Genetic and Clinical Studies of Developmental Language Disorder

Autor/inn/en	Rakhlin, Natalia; Kornilov, Sergey A.; Palejev, Dean; Koposov, Roman A.; Chang, Joseph T.; Grigorenko, Elena L.
Titel	The Language Phenotype of a Small Geographically Isolated Russian-Speaking Population: Implications for Genetic and Clinical Studies of Developmental Language Disorder
Quelle	In: Applied Psycholinguistics, 34 (2013) 5, S.971-1003 (33 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0142-7164
DOI	10.1017/S0142716412000094
Schlagwörter	Genetics; Comparative Analysis; Effect Size; Verbal Ability; Short Term Memory; Russian; Expressive Language; Developmental Disabilities; Rural Areas; Geographic Isolation; Foreign Countries; Nonverbal Ability; Schemata (Cognition); Incidence; Language Impairments; Children + Suchen Sie Ihr Suchwort? Humangenetik; Mündliche Leistung; Kurzzeitgedächtnis; Russisch; Entwicklungsstörung; Rural area; Ländlicher Raum; Ausland; Cognition; Schema; Kognition; Vorkommen; Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Child; Kind; Kinder
Abstract	This article describes the results of an epidemiological study of developmental language disorder (DLD) in an isolated rural Russian population. We report an atypically high prevalence of DLD across all age groups when contrasted with a comparison population. The results are corroborated by a set of comparisons of school-aged children from the target population with their age peers and mean length of utterance matches from the comparison population. We also investigate the relationship between nonverbal cognition, verbal working memory, and expressive language performance in the population, and find statistically significant but small effect sizes. Finally, we describe the complex and heterogeneous structure of the phenotype in the population along with patterns of its vertical transmission on the basis of the exemplar pedigrees, and discuss the implications of our findings for genetic and clinical studies of DLD. (As Provided).
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Update	2017/4/10