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ERIC Number: EJ926995
Record Type: Journal
Publication Date: 2011
Pages: 20
Abstractor: As Provided
Reference Count: 47
ISSN: ISSN-1088-8438
Choice of Reading Comprehension Test Influences the Outcomes of Genetic Analyses
Betjemann, Rebecca S.; Keenan, Janice M.; Olson, Richard K.; DeFries, John C.
Scientific Studies of Reading, v15 n4 p363-382 2011
Does the choice of test for assessing reading comprehension influence the outcome of genetic analyses? A twin design compared two types of reading comprehension tests classified as primarily associated with word decoding (RC-D) or listening comprehension (RC-LC). For both types of tests, the overall genetic influence is high and nearly identical. However, the tests differed significantly in how they covary with the genes associated with decoding and listening comprehension. Although Cholesky decomposition showed that both types of comprehension tests shared significant genetic influence with both decoding and listening comprehension, RC-D tests shared most genetic variance with decoding, and RC-LC tests shared most with listening comprehension. Thus, different tests used to measure the same construct may manifest very different patterns of genetic covariation. These results suggest that the apparent discrepancies among the findings of previous twin studies of reading comprehension could be due at least in part to test differences. (Contains 5 tables, 1 figure and 1 footnote.)
Routledge. Available from: Taylor & Francis, Ltd. 325 Chestnut Street Suite 800, Philadelphia, PA 19106. Tel: 800-354-1420; Fax: 215-625-2940; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Colorado
Identifiers - Assessments and Surveys: Gray Oral Reading Test; Peabody Individual Achievement Test