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Choice of Reading Comprehension Test Influences the Outcomes of Genetic Analyses
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Betjemann, Rebecca S.; Keenan, Janice M.; Olson, Richard K.; DeFries, John C. – Scientific Studies of Reading, 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.…
Descriptors: Reading Comprehension, Listening Comprehension, Siblings, Genetics
Reading Comprehension Tests Vary in the Skills They Assess: Differential Dependence on Decoding and Oral Comprehension
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Keenan, Janice M.; Betjemann, Rebecca S.; Olson, Richard K. – Scientific Studies of Reading, 2008
Comprehension tests are often used interchangeably, suggesting an implicit assumption that they are all measuring the same thing. We examine the validity of this assumption by comparing some of the most popular reading comprehension measures used in research and clinical practice in the United States: the Gray Oral Reading Test (GORT), the two…
Descriptors: Reading Comprehension, Listening Comprehension, Age, Oral Reading
SSSR, Environment, and Genes
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Olson, Richard K. – Scientific Studies of Reading, 2004
Environment and Genes are often found in the titles of my articles, but this is the first and most likely the last of my titles to include SSSR. This article is based on my presidential address at the 10th annual meeting of the Society for the Scientific Study of Reading (SSSR) in Boulder, Colorado (2003), so I begin with some reflection on the…
Descriptors: Environmental Influences, Genetics, Reading Difficulties, Reading Research