NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ971373
Record Type: Journal
Publication Date: 2012
Pages: 11
Abstractor: As Provided
Reference Count: 35
ISSN: ISSN-0022-2194
Math Fluency Is Etiologically Distinct from Untimed Math Performance, Decoding Fluency, and Untimed Reading Performance: Evidence from a Twin Study
Petrill, Stephen; Logan, Jessica; Hart, Sara; Vincent, Pamela; Thompson, Lee; Kovas, Yulia; Plomin, Robert
Journal of Learning Disabilities, v45 n4 p371-381 Jul-Aug 2012
The authors examined whether math fluency was independent from untimed math and from reading using 314 pairs of school-aged twins drawn from the Western Reserve Reading and Math Projects. Twins were assessed through a 90-min home visit at approximately age 10 and were reassessed in their homes approximately 1 year later. Results suggested that the shared environment and genetics influenced the covariance among math fluency, untimed math measures, and reading measures. However, roughly two thirds of the variance in math fluency was independent from untimed math measures and reading, including reading fluency. The majority of this independent variance was the result of genetic factors that were longitudinally stable across two measurement occasions. These results suggest that math fluency, although related to other math measures, may also be a genetically distinct dimension of mathematics performance. (Contains 4 tables and 3 figures.)
SAGE Publications and Hammill Institute on Disabilities. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Ohio