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Direct linkBetjemann, 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
Peer reviewedBoada, Richard; Willcutt, Erik G.; Tunick, Rachel A.; Chhabildas, Nomita A.; Olson, Richard K.; DeFries, John C.; Pennington, Bruce F. – Reading and Writing: An Interdisciplinary Journal, 2002
Examines the etiology of high reading ability in twin pairs. Suggests that reading ability and its cognitive correlates are on a continuous distribution, with both extremes of the distribution being similarly heritable. Supports the hypothesis that the same cognitive processes that are associated with dyslexia are important for the development of…
Descriptors: Cognitive Processes, Dyslexia, Elementary Education, Etiology
