Erik G Willcutt

Summary

Affiliation: University of Colorado
Country: USA

Publications

  1. ncbi request reprint Quantitative trait locus for reading disability on chromosome 6p is pleiotropic for attention-deficit/hyperactivity disorder
    Erik G Willcutt
    Institute for Behavioral Genetics, University of Colorado, Boulder, Colorado 80309, USA
    Am J Med Genet 114:260-8. 2002
  2. ncbi request reprint Neuropsychological analyses of comorbidity between reading disability and attention deficit hyperactivity disorder: in search of the common deficit
    Erik G Willcutt
    Department of Psychology, University of Colorado at Boulder, CO 80309, USA
    Dev Neuropsychol 27:35-78. 2005
  3. ncbi request reprint Colorado longitudinal twin study of reading disability
    Sally J Wadsworth
    Institute for Behavioral Genetics, University of Colorado, 447 UCB, Boulder, CO 80309, USA
    Ann Dyslexia 57:139-60. 2007
  4. pmc Behavioral disinhibition: liability for externalizing spectrum disorders and its genetic and environmental relation to response inhibition across adolescence
    Susan E Young
    Institute for Behavioral Genetics, University of Colorado at Boulder, Boulder, CO 80309, USA
    J Abnorm Psychol 118:117-30. 2009
  5. pmc Heritability of high reading ability and its interaction with parental education
    Angela Friend
    Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA
    Behav Genet 39:427-36. 2009
  6. pmc Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models
    Erik G Willcutt
    Department of Psychology, University of Colorado, Boulder, CO 80309, USA
    Cortex 46:1345-61. 2010
  7. pmc Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder
    Jenni Rosenberg
    Department of Psychology, University of Denver, Denver, CO 80208 0001, USA
    J Child Psychol Psychiatry 53:243-51. 2012
  8. ncbi request reprint Test of alternative hypotheses explaining the comorbidity between attention-deficit/hyperactivity disorder and conduct disorder
    Soo Hyun Rhee
    Department of Psychology, University of Colorado, Boulder, CO 80309, USA
    J Abnorm Child Psychol 36:29-40. 2008
  9. pmc Genetic and environmental influences on writing and their relations to language and reading
    Richard K Olson
    Department of Psychology and Neuroscience, Institute for Behavioral Genetics, University of Colorado at Boulder, Box 345, Boulder, CO 80309, USA
    Ann Dyslexia 63:25-43. 2013
  10. pmc Symptom-correlated brain regions in young adults with combined-type ADHD: their organization, variability, and relation to behavioral performance
    Brendan E Depue
    Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA
    Psychiatry Res 182:96-102. 2010

Detail Information

Publications41

  1. ncbi request reprint Quantitative trait locus for reading disability on chromosome 6p is pleiotropic for attention-deficit/hyperactivity disorder
    Erik G Willcutt
    Institute for Behavioral Genetics, University of Colorado, Boulder, Colorado 80309, USA
    Am J Med Genet 114:260-8. 2002
    ....
  2. ncbi request reprint Neuropsychological analyses of comorbidity between reading disability and attention deficit hyperactivity disorder: in search of the common deficit
    Erik G Willcutt
    Department of Psychology, University of Colorado at Boulder, CO 80309, USA
    Dev Neuropsychol 27:35-78. 2005
    ..Slow and variable processing speed was characteristic of all 3 clinical groups, suggesting that measures of this domain may be useful for future studies that search for the common genes that increase susceptibility to RD and ADHD...
  3. ncbi request reprint Colorado longitudinal twin study of reading disability
    Sally J Wadsworth
    Institute for Behavioral Genetics, University of Colorado, 447 UCB, Boulder, CO 80309, USA
    Ann Dyslexia 57:139-60. 2007
    ..In addition, genetic correlations reached unity for both groups, suggesting that the same genetic influences are manifested at both time points...
  4. pmc Behavioral disinhibition: liability for externalizing spectrum disorders and its genetic and environmental relation to response inhibition across adolescence
    Susan E Young
    Institute for Behavioral Genetics, University of Colorado at Boulder, Boulder, CO 80309, USA
    J Abnorm Psychol 118:117-30. 2009
    ..These results highlight the dynamic nature of behavioral disinhibition across adolescence and suggest that response inhibition may be an important mechanism underlying vulnerability to disinhibitory psychopathology...
  5. pmc Heritability of high reading ability and its interaction with parental education
    Angela Friend
    Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA
    Behav Genet 39:427-36. 2009
    ..This result provides a coherent account when considered alongside results of previous research showing that heritability for low reading ability decreased with lower levels of parental education...
  6. pmc Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models
    Erik G Willcutt
    Department of Psychology, University of Colorado, Boulder, CO 80309, USA
    Cortex 46:1345-61. 2010
    ..Attention-deficit/hyperactivity disorder (ADHD) and reading disability (RD) are complex childhood disorders that frequently co-occur, but the etiology of this comorbidity remains unknown...
  7. pmc Gene by environment interactions influencing reading disability and the inattentive symptom dimension of attention deficit/hyperactivity disorder
    Jenni Rosenberg
    Department of Psychology, University of Denver, Denver, CO 80208 0001, USA
    J Child Psychol Psychiatry 53:243-51. 2012
    ..However, previous research indicates that RD and ADHD enter into opposite gene by environment (G × E) interactions...
  8. ncbi request reprint Test of alternative hypotheses explaining the comorbidity between attention-deficit/hyperactivity disorder and conduct disorder
    Soo Hyun Rhee
    Department of Psychology, University of Colorado, Boulder, CO 80309, USA
    J Abnorm Child Psychol 36:29-40. 2008
    ..The results suggest that correlated risk factors are a better explanation for the comorbidity between ADHD and CD than a third, independent ADHD+CD subtype...
  9. pmc Genetic and environmental influences on writing and their relations to language and reading
    Richard K Olson
    Department of Psychology and Neuroscience, Institute for Behavioral Genetics, University of Colorado at Boulder, Box 345, Boulder, CO 80309, USA
    Ann Dyslexia 63:25-43. 2013
    ..We discuss implications of our results for education, limitations of the study, and new directions for research on writing and its relations to language and reading...
  10. pmc Symptom-correlated brain regions in young adults with combined-type ADHD: their organization, variability, and relation to behavioral performance
    Brendan E Depue
    Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA
    Psychiatry Res 182:96-102. 2010
    ..The results suggest that a diverse set of brain structures is linked to ADHD symptoms and that the variability of activation within these regions may contribute to compromised attentional control...
  11. pmc Colorado Learning Difficulties Questionnaire: validation of a parent-report screening measure
    Erik G Willcutt
    Department of Psychology and Neuroscience, UCB 345, University of Colorado, Boulder, CO 80309, USA
    Psychol Assess 23:778-91. 2011
    ..Results are also promising for the other 4 CLDQ scales, but additional research is needed to refine each of these measures...
  12. pmc Understanding the complex etiologies of developmental disorders: behavioral and molecular genetic approaches
    Erik G Willcutt
    Department of Psychology and Neuroscience, University of Colorado at Boulder, Boulder, CO 80309, USA
    J Dev Behav Pediatr 31:533-44. 2010
    ..Implications of the results for these specific disorders and for developmental disabilities as a whole are discussed, and novel directions for future research are highlighted...
  13. pmc Gene X environment interactions in reading disability and attention-deficit/hyperactivity disorder
    Bruce F Pennington
    Department of Psychology, University of Denver, USA
    Dev Psychol 45:77-89. 2009
    ..However, they did not find a G x E interaction at the favorable end of the ADHD symptom dimension. The authors conclude with implications for future research...
  14. ncbi request reprint Greater attention problems during childhood predict poorer executive functioning in late adolescence
    Naomi P Friedman
    Institute for Behavioral Genetics, 447 UCB, University of Colorado, Boulder, CO 80309, USA
    Psychol Sci 18:893-900. 2007
    ..These results support the hypothesis that attention problems primarily reflect difficulties with response inhibition...
  15. pmc Attentional control activation relates to working memory in attention-deficit/hyperactivity disorder
    Gregory C Burgess
    Institute for Cognitive Science, University of Colorado at Boulder, Boulder, Colorado, USA
    Biol Psychiatry 67:632-40. 2010
    ..The current study examined whether WM ability might explain group differences in brain activation between adults with ADHD and normal control subjects during attentional demand...
  16. ncbi request reprint Processing speed deficits in attention deficit/hyperactivity disorder and reading disability
    Michelle A Shanahan
    Department of Psychology, University of Denver, Denver, Colorado, USA
    J Abnorm Child Psychol 34:585-602. 2006
    ....
  17. pmc DeFries-Fulker analysis of longitudinal reading performance data from twin pairs ascertained for reading difficulties and from their nontwin siblings
    Raven L Astrom
    Institute for Behavioral Genetics, University of Colorado, 447 UCB, Boulder, CO 80309, USA
    Behav Genet 41:660-7. 2011
    ..However, tests for special twin environmental influences were nonsignificant...
  18. pmc Testing for neuropsychological endophenotypes in siblings discordant for attention-deficit/hyperactivity disorder
    L Cinnamon Bidwell
    Department of Psychology, University of Colorado, Boulder, Colorado, USA
    Biol Psychiatry 62:991-8. 2007
    ..Neurocognitive deficits associated with attention-deficit/hyperactivity disorder (ADHD) might be useful intermediate endophenotypes for determining specific genetic pathways that contribute to ADHD...
  19. pmc The neural basis of sustained and transient attentional control in young adults with ADHD
    Marie T Banich
    Institute of Cognitive Science, University of Colorado at Boulder, Boulder, CO 80309 0344, USA
    Neuropsychologia 47:3095-104. 2009
    ....
  20. ncbi request reprint Understanding comorbidity: a twin study of reading disability and attention-deficit/hyperactivity disorder
    Erik G Willcutt
    University of Colorado at Boulder, Boulder, Colorado 80309, USA
    Am J Med Genet B Neuropsychiatr Genet 144:709-14. 2007
    ....
  21. ncbi request reprint Validity of the executive function theory of attention-deficit/hyperactivity disorder: a meta-analytic review
    Erik G Willcutt
    Department of Psychology, University of Colorado, Boulder, Colorado 80309, USA
    Biol Psychiatry 57:1336-46. 2005
    ..Difficulties with EF appear to be one important component of the complex neuropsychology of ADHD...
  22. pmc Individual prediction of dyslexia by single versus multiple deficit models
    Bruce F Pennington
    Department of Psychology, University of Denver, Denver, CO 80208, USA
    J Abnorm Psychol 121:212-24. 2012
    ..We discuss the clinical implications of these results for both diagnosis of school-age children and preschool prediction of children at risk for dyslexia...
  23. pmc Genetic covariation between brain volumes and IQ, reading performance, and processing speed
    Rebecca S Betjemann
    Department of Psychology, D 12, Regis University, 3333 Regis Blvd, Denver, CO 80221, USA
    Behav Genet 40:135-45. 2010
    ..64), and white matter (r (g) = .89), but not prefrontal cortex. The only brain measure to share genetic influence with reading was total brain volume (r (g) = .32), which also shared genetic influences with processing speed...
  24. ncbi request reprint Gene x Environment interactions in speech sound disorder predict language and preliteracy outcomes
    Lauren M McGrath
    University of Denver, Department of Psychology, Frontier Hall, 2155 S Race Street, Denver, CO 80209, USA
    Dev Psychopathol 19:1047-72. 2007
    ..The direction of these interactions and possible interpretations are explored in the discussion...
  25. pmc Behavioral performance predicts grey matter reductions in the right inferior frontal gyrus in young adults with combined type ADHD
    Brendan E Depue
    Department of Psychology, University of Colorado at Boulder, Boulder, CO 80309, USA
    Psychiatry Res 182:231-7. 2010
    ..These morphometric differences are related to disruptions in performance on behavioral tasks that frequently have been reported to be affected in individuals with ADHD...
  26. pmc Validity of DSM-IV attention deficit/hyperactivity disorder symptom dimensions and subtypes
    Erik G Willcutt
    Department of Psychology and Neuroscience, University of Colorado, Boulder, CO 80309, USA
    J Abnorm Psychol 121:991-1010. 2012
    ..PsycINFO Database Record (c) 2012 APA, all rights reserved)...
  27. pmc Multiple regression analysis of reading performance data from twin pairs with reading difficulties and nontwin siblings: the augmented model
    Sally J Wadsworth
    Institute for Behavioral Genetics, University of Colorado, Boulder, CO 80309, USA
    Twin Res Hum Genet 15:116-9. 2012
    ..36) may be substantially greater than those for less contemporaneous twin-sibling pairs (.14)...
  28. ncbi request reprint Testing hypotheses regarding the causes of comorbidity: examining the underlying deficits of comorbid disorders
    Soo Hyun Rhee
    Department of Psychology, University of Colorado, Boulder, CO 80309, USA
    J Abnorm Psychol 114:346-62. 2005
    ..The ability to distinguish the correct model decreased as the sample size and the correlation between the underlying deficits and the symptom scores decreased, suggesting that the issue of power should be considered carefully...
  29. ncbi request reprint Etiology of the comorbidity between RD and ADHD: exploration of the non-random mating hypothesis
    Melanie C Friedman
    Department of Psychology, University of Denver, Denver, Colorado 80208, USA
    Am J Med Genet B Neuropsychiatr Genet 120:109-15. 2003
    ..There was little evidence to support that non-random mating also contributes to this comorbidity in the present sample...
  30. ncbi request reprint Causal heterogeneity in attention-deficit/hyperactivity disorder: do we need neuropsychologically impaired subtypes?
    Joel T Nigg
    Department of Psychology, Michigan State University, East Lansing, Michigan 48824, USA
    Biol Psychiatry 57:1224-30. 2005
    ....
  31. pmc Comorbidity between reading disability and math disability: concurrent psychopathology, functional impairment, and neuropsychological functioning
    Erik G Willcutt
    1University of Colorado at Boulder, Boulder, CO, USA
    J Learn Disabil 46:500-16. 2013
    ....
  32. ncbi request reprint The relation between sluggish cognitive tempo and DSM-IV ADHD
    Christie A Hartman
    Institute for Behavioral Genetics and Department of Psychology, University of Colorado at Boulder, Boulder, Colorado 80309 0447, USA
    J Abnorm Child Psychol 32:491-503. 2004
    ..These results suggest that SCT is an internally consistent construct that is significantly associated with DSM-IV inattention...
  33. ncbi request reprint Modeling rater disagreement for ADHD: are parents or teachers biased?
    Christie A Hartman
    Department of Psychiatry, University of Colorado at Denver and Health Sciences Center, 4200 East 9th Ave, Box C 268 35, Denver, CO 80262, USA
    J Abnorm Child Psychol 35:536-42. 2007
    ....
  34. pmc The prevalence of DSM-IV attention-deficit/hyperactivity disorder: a meta-analytic review
    Erik G Willcutt
    Department of Psychology and Neuroscience, University of Colorado, Boulder, CO 80309, USA
    Neurotherapeutics 9:490-9. 2012
    ..These results provide important support for the diagnostic validity of ADHD, and argue against the hypothesis that ADHD is a cultural construct that is restricted to the United States or any other specific culture...
  35. ncbi request reprint Big five dimensions and ADHD symptoms: links between personality traits and clinical symptoms
    Joel T Nigg
    Department of Psychology, Michigan State University, East Lansing 48824 1117, USA
    J Pers Soc Psychol 83:451-69. 2002
    ..Results were replicated with self-reports and observer reports of personality in community and clinical samples. Findings support theoretical connections between personality traits and ADHD symptoms...
  36. ncbi request reprint ADHD prevalence estimates across three decades: an updated systematic review and meta-regression analysis
    Guilherme V Polanczyk
    Department of Psychiatry, University of Sao Paulo Medical School, Sao Paulo, Brazil, Research Support Center on Neurodevelopment and Mental Health, University of Sao Paulo, Sao Paulo, Brazil, National Institute of Developmental Psychiatry for Children and Adolescents INCT CNPq, Sao Paulo, Brazil, Department of Psychology and Neuroscience, University of Colorado at Boulder, Boulder, CO, USA and ADHD Outpatient Program at the Child and Adolescent Psychiatric Division, Hospital de Clinicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
    Int J Epidemiol 43:434-42. 2014
    ..However, increasing rates of ADHD diagnosis and treatment throughout the past few decades have fuelled concerns about whether the true prevalence of the disorder has increased over time...
  37. ncbi request reprint Attention-deficit/hyperactivity disorder endophenotypes
    Alysa E Doyle
    Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
    Biol Psychiatry 57:1324-35. 2005
    ..We conclude that these endophenotypes will not be a quick fix for the field but offer potential if careful consideration is given to issues of heterogeneity, measurement and statistical power...
  38. ncbi request reprint Sex differences in young children who meet criteria for attention deficit hyperactivity disorder
    Cynthia M Hartung
    Oklahoma State University, USA
    J Clin Child Adolesc Psychol 31:453-64. 2002
    ..Young girls and boys who meet DSM-IV criteria for ADHD are more similar than different, but boys tend to display more symptoms of ADHD, particularly in school...
  39. ncbi request reprint Three-year predictive validity of DSM-IV attention deficit hyperactivity disorder in children diagnosed at 4-6 years of age
    Benjamin B Lahey
    Department of Psychiatry MC 3077, University of Chicago, 5811 South Maryland Avenue, Chicago, IL 60637, USA
    Am J Psychiatry 161:2014-20. 2004
    ..Predictive validity is a fundamental consideration in evaluating the DSM-IV diagnostic criteria for attention deficit hyperactivity disorder (ADHD), particularly for younger children...
  40. ncbi request reprint Are endophenotypes based on measures of executive functions useful for molecular genetic studies of ADHD?
    Alysa E Doyle
    Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
    J Child Psychol Psychiatry 46:774-803. 2005
    ..Thus far, potential endophenotypes for ADHD have not been systematically studied...
  41. ncbi request reprint Collaborative analysis of DRD4 and DAT genotypes in population-defined ADHD subtypes
    Richard D Todd
    Department of Psychiatry, Washington University School of Medicine, St Louis, Missouri 63110, USA
    J Child Psychol Psychiatry 46:1067-73. 2005
    ..The goal of the current study is to test whether population-based ADHD subtypes defined by latent class analysis help resolve issues of variable findings across individual gene association studies...