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factorial analysis of timed and untimed measures of mathematics and reading abilities in school aged twins

Title: A factorial analysis of timed and untimed measures of mathematics and reading abilities in school aged twins.
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Name(s): Hart, Sara, author
Petrill, Stephen, author
Thompson, Lee, author
Type of Resource: text
Genre: text
Issuance: serial
Date Issued: 2010
Physical Form: computer
Physical Form: online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: 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 = 9.86yrs). Measurement models suggested four factors represented 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 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.
Identifier: FSU_migr_psy_faculty_publications-0007 (IID), 10.1016/j.lindif.2009.10.004 (DOI)
Keywords: mathematics; reading; fluency; twins; genetics
Note: This is an Author's Accepted Manuscript of an article published in Learning and Individual Differences, 2010 © Copyright Elsevier, available online at: http://dx.doi.org/10.1016/j.lindif.2009.10.004
Citation: Hart, S.A., Petrill, S.A., Thompson, L.A. (2010). A factorial analysis of timed and untimed measures of mathematics and reading abilities in school aged twins. Learning and Individual Differences, 20, 63-69.
Subject(s): Psychology
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_psy_faculty_publications-0007
Owner Institution: FSU
Is Part of Series: Department of Psychology Faculty Publications.
Is Part Of: Learning and Individual Differences.