A Factorial Analysis of Timed and Untimed Measures of Mathematics and Reading Abilities in School Aged Twins

Autor/inn/en	Hart, Sara A.; Petrill, Stephen A.; Thompson, Lee A.
Titel	A Factorial Analysis of Timed and Untimed Measures of Mathematics and Reading Abilities in School Aged Twins
Quelle	In: Learning and Individual Differences, 20 (2010) 2, S.63-69 (7 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1041-6080
DOI	10.1016/j.lindif.2009.10.004
Schlagwörter	Twins; Genetics; Reading Ability; Mathematics Achievement; Measures (Individuals); Reading Achievement; Longitudinal Studies; Measurement; Decoding (Reading); Reading Fluency; Reading Comprehension; Mathematics Skills; Factor Analysis; Ohio + Suchen Sie Ihr Suchwort? Twin; Zwilling; Humangenetik; Reading competence; Lesekompetenz; Mathmatics sikills; Mathmatics achievement; Mathematical ability; Mathematische Kompetenz; Messdaten; Leseleistung; Longitudinal study; Longitudinal method; Longitudinal methods; Längsschnittuntersuchung; Messverfahren; Dekodierung; Leseverstehen; Mathematics ability; Faktorenanalyse
Abstract	The present study examined the phenotypic and genetic relationship between fluency and non-fluency-based measures of reading and mathematics performance. Participants were drawn from the Western Reserve Reading and Math Project, an ongoing longitudinal twin project of same-sex MZ and DZ twins from Ohio. The present analyses are based on tester-administered measures available from 228 twin pairs (age M = 9.86 years). Measurement models suggested that four factors represent the data, namely Decoding, Fluency, Comprehension, and Math. Subsequent quantitative genetic analyses of these latent factors suggested that a single genetic factor accounted for the covariance among these four latent factors. However, there were also unique genetic effects on Fluency and Math, independent from the common genetic factor. Thus, although there is a significant genetic overlap among different reading and math skills, there may be independent genetic sources of variation related to measures of decoding fluency and mathematics. (Contains 5 tables and 2 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10