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Richard Olson

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Amanda C Miller; Rebecca S Betjemann; Janice M Keenan; Bruce F Pennington; Erik G Willcutt; Richard K Olson
Reading comprehension in children with ADHD: cognitive underpinnings of the centrality deficit.
Richard K Olson; Bruce F Pennington; Sally J Wadsworth; Erik G Willcutt; Micaela Christopher; Jacqueline Hulslander; Janice M Keenan; John C DeFries
Genetic and environmental influences on writing and their relations to language and reading.
Anne B Arnett; Brian Byrne; Angela Friend; Bruce F Pennington; Stefan Samuelsson; Erik G Willcutt; Richard K Olson
The SWAN captures variance at the negative and positive ends of the ADHD symptom dimension.

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2013: Amanda C Miller; Rebecca S Betjemann; Janice M Keenan; Bruce F Pennington; Erik G Willcutt; Richard K Olson
Reading comprehension in children with ADHD: cognitive underpinnings of the centrality deficit.
Journal of abnormal child psychology 2013;41(3):473-83.
2013: Richard K Olson; Bruce F Pennington; Sally J Wadsworth; Erik G Willcutt; Micaela Christopher; Jacqueline Hulslander; Janice M Keenan; John C DeFries
Genetic and environmental influences on writing and their relations to language and reading.
Annals of dyslexia 2013;63(1):25-43.
2013: Anne B Arnett; Brian Byrne; Angela Friend; Bruce F Pennington; Stefan Samuelsson; Erik G Willcutt; Richard K Olson
The SWAN captures variance at the negative and positive ends of the ADHD symptom dimension.
Journal of attention disorders 2013;17(2):152-62.
2013: Robin L Peterson; Bruce F Pennington; Richard K Olson
Subtypes of developmental dyslexia: testing the predictions of the dual-route and connectionist frameworks.
Cognition 2013;126(1):20-38.
2012: Anne B Arnett; Brian Byrne; Julia Dmitrieva; Bruce F Pennington; Stefan Samuelsson; Erik Willcutt; Richard K Olson
A cross-lagged model of the development of ADHD inattention symptoms and rapid naming speed.
Journal of abnormal child psychology 2012;40(8):1313-26.
2012: Micaela E Christopher; John C DeFries; Janice M Keenan; Akira Miyake; Bruce Pennington; Sally J Wadsworth; Erik G Willcutt; Richard K Olson
Predicting word reading and comprehension with executive function and speed measures across development: a latent variable analysis.
Journal of experimental psychology. General 2012;141(3):470-88.
2012: Jenni Rosenberg; Erik G Willcutt; Bruce F Pennington; Richard K Olson
Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder.
Journal of child psychology and psychiatry, and allied disciplines 2012;53(3):243-51.
2012: Sally J Wadsworth; Erik G Willcutt; Richard K Olson; John C DeFries
Multiple regression analysis of reading performance data from twin pairs with reading difficulties and nontwin siblings: the augmented model.
Twin research and human genetics : the official journal of the International Society for Twin Studies 2012;15(1):116-9.
2012: Bruce F Pennington; Jennifer Rosenberg; Stefan Samuelsson; Laura Santerre-Lemmon; Erik G Willcutt; Richard Boada; Brian Byrne; Angela Friend; Daniel R Leopold; Beatriz MacDonald; Richard K Olson
Individual prediction of dyslexia by single versus multiple deficit models.
Journal of abnormal psychology 2012;121(1):212-24.
2011: Raven L Astrom; Richard K Olson; Sally J Wadsworth; Erik G Willcutt; John C DeFries
DeFries-Fulker analysis of longitudinal reading performance data from twin pairs ascertained for reading difficulties and from their nontwin siblings.
Behavior genetics 2011;41(5):660-7.
2011: William L Coventry; Richard K Olson; Brian Byrne; Robin Corley; Stefan Samuelsson
Dynamic and static assessment of phonological awareness in preschool: a behavior-genetic study.
Journal of learning disabilities 2011;44(4):322-9.
2011: Lauren M McGrath; Bruce F Pennington; Michelle A. Shanahan; Laura E Santerre-Lemmon; Holly Barnard; Erik G Willcutt; John C DeFries; Richard K Olson
A multiple deficit model of reading disability and attention-deficit/hyperactivity disorder: searching for shared cognitive deficits.
Journal of child psychology and psychiatry, and allied disciplines 2011;52(5):547-57.
2010: Erik G Willcutt; Rebecca S Betjemann; Lauren M McGrath; Nomita Chhabildas; Richard K Olson; John C DeFries; Bruce F Pennington
Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models.
Cortex; a journal devoted to the study of the nervous system and behavior 2010;46(10):1345-61.
2010: Sally J Wadsworth; Richard K Olson; John C DeFries
Differential genetic etiology of reading difficulties as a function of IQ: an update.
Behavior genetics 2010;40(6):751-8.
2010: Erik G Willcutt; Bruce F Pennington; Laramie Duncan; Shelley D Smith; Janice M Keenan; Sally Wadsworth; John C DeFries; Richard K Olson
Understanding the complex etiologies of developmental disorders: behavioral and molecular genetic approaches.
Journal of developmental and behavioral pediatrics : JDBP 2010;31(7):533-44.
2010: Thomas Scerri; Silvia Paracchini; Andrew Morris; I Laurence MacPhie; Joel B Talcott; John Stein; Shelley D Smith; Bruce F Pennington; Richard K Olson; John C DeFries; Anthony P Monaco; Alex J Richardson
Identification of candidate genes for dyslexia susceptibility on chromosome 18.
PloS one 2010;5(10):e13712.
2009: Jesse L Hawke; Richard K Olson; Erik G Willcut; Sally J Wadsworth; John C DeFries
Gender ratios for reading difficulties.
Dyslexia (Chichester, England) 2009;15(3):239-42.
2009: Angela Friend; John C DeFries; Richard K Olson; Bruce F Pennington; Nicole Harlaar; Brian Byrne; Stefan Samuelsson; Erik G Willcutt; Sally J Wadsworth; Robin Corley; Janice M Keenan
Heritability of high reading ability and its interaction with parental education.
Behavior genetics 2009;39(4):427-36.
2009: Bruce F Pennington; Lauren M McGrath; Jenni Rosenberg; Holly Barnard; Shelley D Smith; Erik G Willcutt; Angela Friend; John C DeFries; Richard K Olson
Gene X environment interactions in reading disability and attention-deficit/hyperactivity disorder.
Developmental psychology 2009;45(1):77-89.
2007: Sally J Wadsworth; John C DeFries; Richard K Olson; Erik G Willcutt
Colorado longitudinal twin study of reading disability.
Annals of dyslexia 2007;57(2):139-60.
2007: Erik G Willcutt; Bruce F Pennington; Richard K Olson; John C DeFries
Understanding comorbidity: a twin study of reading disability and attention-deficit/hyperactivity disorder.
American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics 2007;144B(6):709-14.
2007: Angela Friend; John C DeFries; Sally J Wadsworth; Richard K Olson
Genetic and environmental influences on word recognition and spelling deficits as a function of age.
Behavior genetics 2007;37(3):477-86.
2006: Richard K Olson
Genes, environment, and dyslexia. The 2005 Norman Geschwind Memorial Lecture.
Annals of dyslexia 2006;56(2):205-38.
2006: Michelle A. Shanahan; Bruce F Pennington; Benjamin E Yerys; Ashley Scott; Richard Boada; Erik G Willcutt; Richard K Olson; John C DeFries
Processing speed deficits in attention deficit/hyperactivity disorder and reading disability.
Journal of abnormal child psychology 2006;34(5):585-602.
2005: Haiying Meng; Shelley D Smith; Karl Hager; Matthew Held; Jonathan Liu; Richard K Olson; Bruce F Pennington; John C DeFries; Joel Gelernter; Thomas O'Reilly-Pol; Stefan Somlo; Pawel Skudlarski; Sally E Shaywitz; Bennett A Shaywitz; Karen E Marchione; Yu Wang; Murugan Paramasivam; joe loturco; Grier P Page; Jeffrey R Gruen
DCDC2 is associated with reading disability and modulates neuronal development in the brain.
Proceedings of the National Academy of Sciences of the United States of America 2005;102(47):17053-8.
2005: Javier Gayán; Erik G Willcutt; Simon E Fisher; Clyde Francks; Lon R Cardon; Richard K Olson; Bruce F Pennington; Shelley D Smith; Anthony P Monaco; John C DeFries
Bivariate linkage scan for reading disability and attention-deficit/hyperactivity disorder localizes pleiotropic loci.
Journal of child psychology and psychiatry, and allied disciplines 2005;46(10):1045-56.
2005: Haiying Meng; Karl Hager; Matthew Held; Grier P Page; Richard K Olson; Bruce F Pennington; John C DeFries; Shelley D Smith; Jeffrey R Gruen
TDT-association analysis of EKN1 and dyslexia in a Colorado twin cohort.
Human genetics 2005;118(1):87-90.
2005: Erik G Willcutt; Bruce F Pennington; Richard K Olson; Nomita Chhabildas; Jacqueline Hulslander
Neuropsychological analyses of comorbidity between reading disability and attention deficit hyperactivity disorder: in search of the common deficit.
Developmental neuropsychology 2005;27(1):35-78.
2004: Clyde Francks; Silvia Paracchini; Shelley D Smith; Alexandra Richardson; Thomas Scerri; Lon R Cardon; Angela J Marlow; I Laurence MacPhie; Janet Walter; Bruce F Pennington; Simon E Fisher; Richard K Olson; John C DeFries; John Stein; Anthony P Monaco
A 77-kilobase region of chromosome 6p22.2 is associated with dyslexia in families from the United Kingdom and from the United States.
American journal of human genetics 2004;75(6):1046-58.
2004: Karen E Deffenbacher; Judith B Kenyon; Denise M Hoover; Richard K Olson; Bruce F Pennington; John C DeFries; Shelley D Smith
Refinement of the 6p21.3 quantitative trait locus influencing dyslexia: linkage and association analyses.
Human genetics 2004;115(2):128-38.
2004: Rolando D Tiu; Sally J Wadsworth; Richard K Olson; John C DeFries
Causal models of reading disability: a twin study.
Twin research : the official journal of the International Society for Twin Studies 2004;7(3):275-83.
2003: Javier Gayán; Richard K Olson
Genetic and environmental influences on individual differences in printed word recognition.
Journal of experimental child psychology 2003;84(2):97-123.
2002: Richard K Olson
Dyslexia: nature and nurture.
Dyslexia (Chichester, England) 2002;8(3):143-59.
2002: Valerie S Knopik; Shelley D Smith; Lon Cardon; Bruce F Pennington; Javier Gayan; Richard K Olson; John C DeFries
Differential genetic etiology of reading component processes as a function of IQ.
Behavior genetics 2002;32(3):181-98.
2002: Deborah E Kaplan; Javier Gayán; Jung Ahn; Tae-Woong Won; David L Pauls; Richard K Olson; John C DeFries; F Wood; Bruce F Pennington; Grier P Page; Shelley D Smith; Jeffrey R Gruen
Evidence for linkage and association with reading disability on 6p21.3-22.
American journal of human genetics 2002;70(5):1287-98.
2002: Erik G Willcutt; Bruce F Pennington; Shelley D Smith; Lon R Cardon; Javier Gayán; Valerie S Knopik; Richard K Olson; John C DeFries
Quantitative trait locus for reading disability on chromosome 6p is pleiotropic for attention-deficit/hyperactivity disorder.
American journal of medical genetics 2002;114(3):260-8.
2002: Clyde Francks; Simon E Fisher; Richard K Olson; Bruce F Pennington; Shelley D Smith; John C DeFries; Anthony P Monaco
Fine mapping of the chromosome 2p12-16 dyslexia susceptibility locus: quantitative association analysis and positional candidate genes SEMA4F and OTX1.
Psychiatric genetics 2002;12(1):35-41.
2002: Simon E Fisher; Clyde Francks; Angela J Marlow; I Laurence MacPhie; Dianne F Newbury; Lon R Cardon; Yumiko Ishikawa-Brush; Alexandra Richardson; Joel B Talcott; Javier Gayán; Richard K Olson; Bruce F Pennington; Shelley D Smith; John C DeFries; John Stein; Anthony P Monaco
Independent genome-wide scans identify a chromosome 18 quantitative-trait locus influencing dyslexia.
Nature genetics 2002;30(1):86-91.
2001: Shelley D Smith; Philip M Kelley; James W Askew; Denise M Hoover; K E Deffenbacher; Javier Gayán; AM Brower; Richard K Olson
Reading disability and chromosome 6p21.3: evaluation of MOG as a candidate gene.
Journal of learning disabilities 2001;34(6):512-9.
2001: C J Davis; Javier Gayán; Valerie S Knopik; Shelley D Smith; Lon R Cardon; Bruce F Pennington; Richard K Olson; John C DeFries
Etiology of reading difficulties and rapid naming: the Colorado Twin Study of Reading Disability.
Behavior genetics 2001;31(6):625-35.
2001: D L Compton; John C DeFries; Richard K Olson
Are RAN- and phonological awareness-deficits additive in children with reading disabilities?
Dyslexia (Chichester, England) 2001;7(3):125-49.
2001: Erik G Willcutt; Bruce F Pennington; Richard Boada; J S Ogline; R A Tunick; Nomita Chhabildas; Richard K Olson
A comparison of the cognitive deficits in reading disability and attention-deficit/hyperactivity disorder.
Journal of abnormal psychology 2001;110(1):157-72.
2001: Javier Gayán; Richard K Olson
Genetic and environmental influences on orthographic and phonological skills in children with reading disabilities.
Developmental neuropsychology 2001;20(2):483-507.
2000: B W Wise; J Ring; Richard K Olson
Individual differences in gains from computer-assisted remedial reading.
Journal of experimental child psychology 2000;77(3):197-235.
2000: Sally J Wadsworth; Richard K Olson; Bruce F Pennington; John C DeFries
Differential genetic etiology of reading disability as a function of IQ.
Journal of learning disabilities 2000;33(2):192-9.
1999: B W Wise; J Ring; Richard K Olson
Training phonological awareness with and without explicit attention to articulation.
Journal of experimental child psychology 1999;72(4):271-304.
1999: Anne Castles; H Datta; J Gayan; Richard K Olson
Varieties of developmental reading disorder: genetic and environmental influences.
Journal of experimental child psychology 1999;72(2):73-94.
1999: Javier Gayán; Richard K Olson
Reading disability: evidence for a genetic etiology.
European child & adolescent psychiatry 1999;8 Suppl 3():52-5.
1999: Javier Gayán; Shelley D Smith; Stacey Cherny; Lon R Cardon; DW Fulker; AM Brower; Richard K Olson; Bruce F Pennington; John C DeFries
Quantitative-trait locus for specific language and reading deficits on chromosome 6p.
American journal of human genetics 1999;64(1):157-64.
1998: J G Light; John C DeFries; Richard K Olson
Multivariate behavioral genetic analysis of achievement and cognitive measures in reading-disabled and control twin pairs.
Human biology 1998;70(2):215-37.
1992: Bruce F Pennington; J W Gilger; Richard K Olson; John C DeFries
The external validity of age- versus IQ-discrepancy definitions of reading disability: lessons from a twin study.
Journal of learning disabilities 1992;25(9):562-73.