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Co-Authors

This is a "connection" page, showing publications co-authored by John DeFries and Richard Olson.

 
Connection Strength
 
 
 
4.524
 
  1. Olson RK, Hulslander J, Christopher M, Keenan JM, Wadsworth SJ, Willcutt EG, Pennington BF, DeFries JC. Genetic and environmental influences on writing and their relations to language and reading. Ann Dyslexia. 2013 Apr; 63(1):25-43.
    View in: PubMed
    Score: 0.471
  2. Arnett AB, Pennington BF, Peterson RL, Willcutt EG, DeFries JC, Olson RK. Explaining the sex difference in dyslexia. J Child Psychol Psychiatry. 2017 Jun; 58(6):719-727.
    View in: PubMed
    Score: 0.172
  3. Wadsworth SJ, DeFries JC, Willcutt EG, Pennington BF, Olson RK. Genetic Etiologies of Comorbidity and Stability for Reading Difficulties and ADHD: A Replication Study. Twin Res Hum Genet. 2016 12; 19(6):647-651.
    View in: PubMed
    Score: 0.169
  4. Christopher ME, Keenan JM, Hulslander J, DeFries JC, Miyake A, Wadsworth SJ, Willcutt E, Pennington B, Olson RK. The genetic and environmental etiologies of the relations between cognitive skills and components of reading ability. J Exp Psychol Gen. 2016 Apr; 145(4):451-66.
    View in: PubMed
    Score: 0.162
  5. Wadsworth SJ, DeFries JC, Willcutt EG, Pennington BF, Olson RK. The Colorado Longitudinal Twin Study of Reading Difficulties and ADHD: Etiologies of Comorbidity and Stability. Twin Res Hum Genet. 2015 Dec; 18(6):755-61.
    View in: PubMed
    Score: 0.158
  6. Arnett AB, Pennington BF, Willcutt EG, DeFries JC, Olson RK. Sex differences in ADHD symptom severity. J Child Psychol Psychiatry. 2015 Jun; 56(6):632-9.
    View in: PubMed
    Score: 0.146
  7. Christopher ME, Hulslander J, Byrne B, Samuelsson S, Keenan JM, Pennington B, DeFries JC, Wadsworth SJ, Willcutt E, Olson RK. Genetic and environmental etiologies of the longitudinal relations between prereading skills and reading. Child Dev. 2015 Mar-Apr; 86(2):342-61.
    View in: PubMed
    Score: 0.146
  8. Christopher ME, Hulslander J, Byrne B, Samuelsson S, Keenan JM, Pennington B, Defries JC, Wadsworth SJ, Willcutt E, Olson RK. The genetic and environmental etiologies of individual differences in early reading growth in Australia, the United States, and Scandinavia. J Exp Child Psychol. 2013 Jul; 115(3):453-67.
    View in: PubMed
    Score: 0.134
  9. Christopher ME, Hulslander J, Byrne B, Samuelsson S, Keenan JM, Pennington B, Defries JC, Wadsworth SJ, Willcutt E, Olson RK. Modeling the Etiology of Individual Differences in Early Reading Development: Evidence for Strong Genetic Influences. Sci Stud Read. 2013; 17(5):350-368.
    View in: PubMed
    Score: 0.130
  10. Christopher ME, Miyake A, Keenan JM, Pennington B, DeFries JC, Wadsworth SJ, Willcutt E, Olson RK. Predicting word reading and comprehension with executive function and speed measures across development: a latent variable analysis. J Exp Psychol Gen. 2012 Aug; 141(3):470-488.
    View in: PubMed
    Score: 0.122
  11. Astrom RL, Wadsworth SJ, Olson RK, Willcutt EG, Defries JC. Genetic and environmental etiologies of reading difficulties: DeFries-Fulker analysis of reading performance data from twin pairs and their nontwin siblings. Learn Individ Differ. 2012 Jun 01; 22(3):365-369.
    View in: PubMed
    Score: 0.122
  12. Wadsworth SJ, Olson RK, Willcutt EG, DeFries JC. Multiple regression analysis of reading performance data from twin pairs with reading difficulties and nontwin siblings: the augmented model. Twin Res Hum Genet. 2012 Feb; 15(1):116-9.
    View in: PubMed
    Score: 0.122
  13. Astrom RL, Wadsworth SJ, Olson RK, Willcutt EG, DeFries JC. DeFries-Fulker analysis of longitudinal reading performance data from twin pairs ascertained for reading difficulties and from their nontwin siblings. Behav Genet. 2011 Sep; 41(5):660-7.
    View in: PubMed
    Score: 0.113
  14. Betjemann RS, Keenan JM, Olson RK, Defries JC. Choice of Reading Comprehension Test Influences the Outcomes of Genetic Analyses. Sci Stud Read. 2011 Jan 01; 15(4):363-382.
    View in: PubMed
    Score: 0.113
  15. Olson RK, Keenan JM, Byrne B, Samuelsson S, Coventry WL, Corley R, Wadsworth SJ, Willcutt EG, Defries JC, Pennington BF, Hulslander J. Genetic and Environmental Influences on Vocabulary and Reading Development. Sci Stud Read. 2011; 15(1):26-46.
    View in: PubMed
    Score: 0.113
  16. McGrath LM, Pennington BF, Shanahan MA, Santerre-Lemmon LE, Barnard HD, Willcutt EG, Defries JC, Olson RK. A multiple deficit model of reading disability and attention-deficit/hyperactivity disorder: searching for shared cognitive deficits. J Child Psychol Psychiatry. 2011 May; 52(5):547-57.
    View in: PubMed
    Score: 0.112
  17. Willcutt EG, Pennington BF, Duncan L, Smith SD, Keenan JM, Wadsworth S, Defries JC, Olson RK. Understanding the complex etiologies of developmental disorders: behavioral and molecular genetic approaches. J Dev Behav Pediatr. 2010 Sep; 31(7):533-44.
    View in: PubMed
    Score: 0.110
  18. Smith SD, Grigorenko E, Willcutt E, Pennington BF, Olson RK, DeFries JC. Etiologies and molecular mechanisms of communication disorders. J Dev Behav Pediatr. 2010 Sep; 31(7):555-63.
    View in: PubMed
    Score: 0.110
  19. Hawke JL, Olson RK, Willcut EG, Wadsworth SJ, DeFries JC. Gender ratios for reading difficulties. Dyslexia. 2009 Aug; 15(3):239-42.
    View in: PubMed
    Score: 0.102
  20. Byrne B, Coventry WL, Olson RK, Samuelsson S, Corley R, Willcutt EG, Wadsworth S, Defries JC. Genetic and Environmental Influences on Aspects of Literacy and Language in Early Childhood: Continuity and Change from Preschool to Grade 2. J Neurolinguistics. 2009 May; 22(3):219-236.
    View in: PubMed
    Score: 0.101
  21. Pennington BF, McGrath LM, Rosenberg J, Barnard H, Smith SD, Willcutt EG, Friend A, Defries JC, Olson RK. Gene X environment interactions in reading disability and attention-deficit/hyperactivity disorder. Dev Psychol. 2009 Jan; 45(1):77-89.
    View in: PubMed
    Score: 0.098
  22. Friend A, DeFries JC, Olson RK. Parental education moderates genetic influences on reading disability. Psychol Sci. 2008 Nov; 19(11):1124-30.
    View in: PubMed
    Score: 0.097
  23. Samuelsson S, Byrne B, Olson RK, Hulslander J, Wadsworth S, Corley R, Willcutt EG, Defries JC. Response to early literacy instruction in the United States, Australia, and Scandinavia: A behavioral-genetic analysis. Learn Individ Differ. 2008; 18(3):289-295.
    View in: PubMed
    Score: 0.092
  24. Willcutt EG, Pennington BF, Olson RK, DeFries JC. Understanding comorbidity: a twin study of reading disability and attention-deficit/hyperactivity disorder. Am J Med Genet B Neuropsychiatr Genet. 2007 Sep 05; 144B(6):709-14.
    View in: PubMed
    Score: 0.090
  25. Friend A, DeFries JC, Wadsworth SJ, Olson RK. Genetic and environmental influences on word recognition and spelling deficits as a function of age. Behav Genet. 2007 May; 37(3):477-86.
    View in: PubMed
    Score: 0.087
  26. Shanahan MA, Pennington BF, Yerys BE, Scott A, Boada R, Willcutt EG, Olson RK, DeFries JC. Processing speed deficits in attention deficit/hyperactivity disorder and reading disability. J Abnorm Child Psychol. 2006 Oct; 34(5):585-602.
    View in: PubMed
    Score: 0.084
  27. Hulslander J, Talcott J, Witton C, DeFries J, Pennington B, Wadsworth S, Willcutt E, Olson R. Sensory processing, reading, IQ, and attention. J Exp Child Psychol. 2004 Jul; 88(3):274-95.
    View in: PubMed
    Score: 0.072
  28. Tiu RD, Wadsworth SJ, Olson RK, DeFries JC. Causal models of reading disability: a twin study. Twin Res. 2004 Jun; 7(3):275-83.
    View in: PubMed
    Score: 0.071
  29. Knopik VS, Smith SD, Cardon L, Pennington B, Gayan J, Olson RK, DeFries JC. Differential genetic etiology of reading component processes as a function of IQ. Behav Genet. 2002 May; 32(3):181-98.
    View in: PubMed
    Score: 0.062
  30. Wakeman HN, Wadsworth SJ, Olson RK, DeFries JC, Pennington BF, Willcutt EG. Mathematics Difficulties and Psychopathology in School-Aged Children. J Learn Disabil. 2022 Apr 25; 222194221084136.
    View in: PubMed
    Score: 0.062
  31. Willcutt EG, Pennington BF, Smith SD, Cardon LR, Gayán J, Knopik VS, Olson RK, DeFries JC. Quantitative trait locus for reading disability on chromosome 6p is pleiotropic for attention-deficit/hyperactivity disorder. Am J Med Genet. 2002 Apr 08; 114(3):260-8.
    View in: PubMed
    Score: 0.062
  32. Gialluisi A, Andlauer TFM, Mirza-Schreiber N, Moll K, Becker J, Hoffmann P, Ludwig KU, Czamara D, Pourcain BS, Honbolygó F, Tóth D, Csépe V, Huguet G, Chaix Y, Iannuzzi S, Demonet JF, Morris AP, Hulslander J, Willcutt EG, DeFries JC, Olson RK, Smith SD, Pennington BF, Vaessen A, Maurer U, Lyytinen H, Peyrard-Janvid M, Leppänen PHT, Brandeis D, Bonte M, Stein JF, Talcott JB, Fauchereau F, Wilcke A, Kirsten H, Müller B, Francks C, Bourgeron T, Monaco AP, Ramus F, Landerl K, Kere J, Scerri TS, Paracchini S, Fisher SE, Schumacher J, Nöthen MM, Müller-Myhsok B, Schulte-Körne G. Genome-wide association study reveals new insights into the heritability and genetic correlates of developmental dyslexia. Mol Psychiatry. 2021 07; 26(7):3004-3017.
    View in: PubMed
    Score: 0.056
  33. Slomowitz RF, Narayan AJ, Pennington BF, Olson RK, DeFries JC, Willcutt EG, McGrath LM. In Search of Cognitive Promotive and Protective Factors for Word Reading. Sci Stud Read. 2021; 25(5):397-416.
    View in: PubMed
    Score: 0.055
  34. Willcutt EG, McGrath LM, Pennington BF, Keenan JM, DeFries JC, Olson RK, Wadsworth SJ. Understanding Comorbidity Between Specific Learning Disabilities. New Dir Child Adolesc Dev. 2019 May; 2019(165):91-109.
    View in: PubMed
    Score: 0.050
  35. Truong DT, Adams AK, Paniagua S, Frijters JC, Boada R, Hill DE, Lovett MW, Mahone EM, Willcutt EG, Wolf M, Defries JC, Gialluisi A, Francks C, Fisher SE, Olson RK, Pennington BF, Smith SD, Bosson-Heenan J, Gruen JR. Multivariate genome-wide association study of rapid automatised naming and rapid alternating stimulus in Hispanic American and African-American youth. J Med Genet. 2019 08; 56(8):557-566.
    View in: PubMed
    Score: 0.050
  36. Gialluisi A, Andlauer TFM, Mirza-Schreiber N, Moll K, Becker J, Hoffmann P, Ludwig KU, Czamara D, St Pourcain B, Brandler W, Honbolygó F, Tóth D, Csépe V, Huguet G, Morris AP, Hulslander J, Willcutt EG, DeFries JC, Olson RK, Smith SD, Pennington BF, Vaessen A, Maurer U, Lyytinen H, Peyrard-Janvid M, Leppänen PHT, Brandeis D, Bonte M, Stein JF, Talcott JB, Fauchereau F, Wilcke A, Francks C, Bourgeron T, Monaco AP, Ramus F, Landerl K, Kere J, Scerri TS, Paracchini S, Fisher SE, Schumacher J, Nöthen MM, Müller-Myhsok B, Schulte-Körne G. Genome-wide association scan identifies new variants associated with a cognitive predictor of dyslexia. Transl Psychiatry. 2019 02 11; 9(1):77.
    View in: PubMed
    Score: 0.049
  37. Adams AK, Smith SD, Truong DT, Willcutt EG, Olson RK, DeFries JC, Pennington BF, Gruen JR. Enrichment of putatively damaging rare variants in the DYX2 locus and the reading-related genes CCDC136 and FLNC. Hum Genet. 2017 11; 136(11-12):1395-1405.
    View in: PubMed
    Score: 0.045
  38. Gialluisi A, Visconti A, Willcutt EG, Smith SD, Pennington BF, Falchi M, DeFries JC, Olson RK, Francks C, Fisher SE. Investigating the effects of copy number variants on reading and language performance. J Neurodev Disord. 2016; 8:17.
    View in: PubMed
    Score: 0.041
  39. Eicher JD, Powers NR, Miller LL, Mueller KL, Mascheretti S, Marino C, Willcutt EG, DeFries JC, Olson RK, Smith SD, Pennington BF, Tomblin JB, Ring SM, Gruen JR. Characterization of the DYX2 locus on chromosome 6p22 with reading disability, language impairment, and IQ. Hum Genet. 2014 Jul; 133(7):869-81.
    View in: PubMed
    Score: 0.035
  40. Willcutt EG, Chhabildas N, Kinnear M, DeFries JC, Olson RK, Leopold DR, Keenan JM, Pennington BF. The internal and external validity of sluggish cognitive tempo and its relation with DSM-IV ADHD. J Abnorm Child Psychol. 2014 Jan; 42(1):21-35.
    View in: PubMed
    Score: 0.035
  41. Fujisawa KK, Wadsworth SJ, Kakihana S, Olson RK, Defries JC, Byrne B, Ando J. A multivariate twin study of early literacy in Japanese Kana. Learn Individ Differ. 2013 Apr 01; 24:160-167.
    View in: PubMed
    Score: 0.033
  42. Willcutt EG, Petrill SA, Wu S, Boada R, Defries JC, Olson RK, Pennington BF. Comorbidity between reading disability and math disability: concurrent psychopathology, functional impairment, and neuropsychological functioning. J Learn Disabil. 2013 Nov-Dec; 46(6):500-16.
    View in: PubMed
    Score: 0.033
  43. Bidwell LC, Willcutt EG, McQueen MB, DeFries JC, Olson RK, Smith SD, Pennington BF. A family based association study of DRD4, DAT1, and 5HTT and continuous traits of attention-deficit hyperactivity disorder. Behav Genet. 2011 Jan; 41(1):165-74.
    View in: PubMed
    Score: 0.028
  44. Scerri TS, Paracchini S, Morris A, MacPhie IL, Talcott J, Stein J, Smith SD, Pennington BF, Olson RK, DeFries JC, Monaco AP, Richardson AJ. Identification of candidate genes for dyslexia susceptibility on chromosome 18. PLoS One. 2010 Oct 28; 5(10):e13712.
    View in: PubMed
    Score: 0.028
  45. Willcutt EG, Betjemann RS, McGrath LM, Chhabildas NA, Olson RK, DeFries JC, Pennington BF. Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models. Cortex. 2010 Nov-Dec; 46(10):1345-61.
    View in: PubMed
    Score: 0.027
  46. Friend A, DeFries JC, Olson RK, Pennington B, Harlaar N, Byrne B, Samuelsson S, Willcutt EG, Wadsworth SJ, Corley R, Keenan JM. Heritability of high reading ability and its interaction with parental education. Behav Genet. 2009 Jul; 39(4):427-36.
    View in: PubMed
    Score: 0.025
  47. Wadsworth SJ, DeFries JC, Olson RK, Willcutt EG. Colorado longitudinal twin study of reading disability. Ann Dyslexia. 2007 Dec; 57(2):139-60.
    View in: PubMed
    Score: 0.023
  48. Meng H, Smith SD, Hager K, Held M, Liu J, Olson RK, Pennington BF, DeFries JC, Gelernter J, O'Reilly-Pol T, Somlo S, Skudlarski P, Shaywitz SE, Shaywitz BA, Marchione K, Wang Y, Paramasivam M, LoTurco JJ, Page GP, Gruen JR. DCDC2 is associated with reading disability and modulates neuronal development in the brain. Proc Natl Acad Sci U S A. 2005 Nov 22; 102(47):17053-8.
    View in: PubMed
    Score: 0.020
  49. Meng H, Hager K, Held M, Page GP, Olson RK, Pennington BF, DeFries JC, Smith SD, Gruen JR. TDT-association analysis of EKN1 and dyslexia in a Colorado twin cohort. Hum Genet. 2005 Oct; 118(1):87-90.
    View in: PubMed
    Score: 0.020
  50. Francks C, Paracchini S, Smith SD, Richardson AJ, Scerri TS, Cardon LR, Marlow AJ, MacPhie IL, Walter J, Pennington BF, Fisher SE, Olson RK, DeFries JC, Stein JF, Monaco AP. A 77-kilobase region of chromosome 6p22.2 is associated with dyslexia in families from the United Kingdom and from the United States. Am J Hum Genet. 2004 Dec; 75(6):1046-58.
    View in: PubMed
    Score: 0.018
  51. Deffenbacher KE, Kenyon JB, Hoover DM, Olson RK, Pennington BF, DeFries JC, Smith SD. Refinement of the 6p21.3 quantitative trait locus influencing dyslexia: linkage and association analyses. Hum Genet. 2004 Jul; 115(2):128-38.
    View in: PubMed
    Score: 0.018
  52. Francks C, Fisher SE, Olson RK, Pennington BF, Smith SD, DeFries JC, Monaco AP. Fine mapping of the chromosome 2p12-16 dyslexia susceptibility locus: quantitative association analysis and positional candidate genes SEMA4F and OTX1. Psychiatr Genet. 2002 Mar; 12(1):35-41.
    View in: PubMed
    Score: 0.015
  53. Fisher SE, Francks C, Marlow AJ, MacPhie IL, Newbury DF, Cardon LR, Ishikawa-Brush Y, Richardson AJ, Talcott JB, Gayán J, Olson RK, Pennington BF, Smith SD, DeFries JC, Stein JF, Monaco AP. Independent genome-wide scans identify a chromosome 18 quantitative-trait locus influencing dyslexia. Nat Genet. 2002 Jan; 30(1):86-91.
    View in: PubMed
    Score: 0.015
Connection Strength

The connection strength for concepts is the sum of the scores for each matching publication.

Publication scores are based on many factors, including how long ago they were written and whether the person is a first or senior author.

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