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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

Showing all 6 results
Genetic and Environmental Influences on Writing and Their Relations to Language and Reading
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Olson, Richard K.; Hulslander, Jacqueline; Christopher, Micaela; Keenan, Janice M.; Wadsworth, Sally J.; Willcutt, Erik G.; Pennington, Bruce F.; DeFries, John C. – Annals of Dyslexia, 2013
Identical and fraternal twins (N = 540, age 8 to 18 years) were tested on three different measures of writing (Woodcock-Johnson III Tests of Achievement--Writing Samples and Writing Fluency; Handwriting Copy from the Group Diagnostic Reading and Aptitude Achievement Tests), three different language skills (phonological awareness, rapid naming, and…
Descriptors: Measurement, Achievement Tests, Genetics, Word Recognition
Colorado Longitudinal Twin Study of Reading Disability
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Wadsworth, Sally J.; DeFries, John C.; Olson, Richard K.; Willcutt, Erik G. – Annals of Dyslexia, 2007
The primary objectives of the present study are to introduce the Colorado Longitudinal Twin Study of Reading Disability, the first longitudinal twin study in which subjects have been specifically selected for having a history of reading difficulties, and to present some initial assessments of the stability of reading performance and cognitive…
Descriptors: Reading Difficulties, Twins, Genetics, Cognitive Ability
Genes, Environment, and Dyslexia: The 2005 Norman Geschwind Memorial Lecture
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Olson, Richard K. – Annals of Dyslexia, 2006
This article presents an overview of some methods and results from our continuing studies of genetic and environmental influences on dyslexia, and on individual differences across the normal range that have been conducted over the past 25 years in the Colorado Learning Disabilities Research Center (CLDRC) and in related projects. CLDRC…
Descriptors: Early Reading, Environmental Influences, Family Environment, Learning Disabilities
Longitudinal Twin Study of Early Reading Development in Three Countries: Preliminary Results.
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Byrne, Brian; Delaland, Cara; Fielding-Barnsley, Ruth; Quain, Peter; Samuelsson, Stefan; Hoien, Torleiv; Corley, Robin; DeFries, John C.; Wadsworth, Sally; Willcutt, Erik; Olson, Richard K. – Annals of Dyslexia, 2002
Preliminary results from data on 146 Australian, 284 American, and 70 Norwegian preschool twins indicate reliable genetic influences on phonological awareness and memory and learning. Vocabulary, grammar, and morphology showed significant shared environment and negligible genetic effects. A print knowledge composite showed genetic and shared…
Descriptors: Beginning Reading, Biological Influences, Cognitive Processes, Dyslexia
Genetic and Environmental Influences on Rapid Naming and Reading Ability: A Twin Study.
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Davis, Chayna J.; Knopik, Valerie S.; Olson, Richard K.; Wadsworth, Sally J.; DeFries, John C. – Annals of Dyslexia, 2001
A study assessed genetic and environmental etiologies of reading, rapid naming (RN), and their covariation using data from 587 twin pairs (ages 7-20) in which one student had reading difficulties and from 360 control pairs. Correlation between reading and RN performances for subjects was significantly higher than that of controls. (Contains…
Descriptors: Biological Influences, Elementary Secondary Education, Environmental Influences, Etiology
Computer-Based Phonological Awareness and Reading Instruction.
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Wise, Barbara W.; Olson, Richard K. – Annals of Dyslexia, 1995
Elementary students (n=105) with problems in word recognition were given computer-assisted instruction involving either only reading words in context, or reading words in context and completing exercises involving individual words (to increase their phonological awareness). The latter group showed significant gains on tests of phoneme awareness…
Descriptors: Computer Assisted Instruction, Elementary Education, Instructional Effectiveness, Phonology