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John DeFries

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Micaela E Christopher; John C DeFries; Jacqueline Hulslander; Janice M Keenan; Bruce Pennington; Stefan Samuelsson; Sally J Wadsworth; Erik G Willcutt; Brian Byrne; Richard K Olson
The genetic and environmental etiologies of individual differences in early reading growth in Australia, the United States, and Scandinavia.
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.
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.

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2013: Micaela E Christopher; John C DeFries; Jacqueline Hulslander; Janice M Keenan; Bruce Pennington; Stefan Samuelsson; Sally J Wadsworth; Erik G Willcutt; Brian Byrne; Richard K Olson
The genetic and environmental etiologies of individual differences in early reading growth in Australia, the United States, and Scandinavia.
Journal of experimental child psychology 2013;115(3):453-67.
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.
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: 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.
2011: Erik G Willcutt; Margaret W Riddle; Richard Boada; Nomita Chhabildas; John C DeFries; Bruce F Pennington
Colorado Learning Difficulties Questionnaire: validation of a parent-report screening measure.
Psychological assessment 2011;23(3):778-91.
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: 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.
2011: L Cinnamon Bidwell; Erik G Willcutt; Matthew B McQueen; John C DeFries; Richard K Olson; Shelley D Smith; Bruce F Pennington
A family based association study of DRD4, DAT1, and 5HTT and continuous traits of attention-deficit hyperactivity disorder.
Behavior genetics 2011;41(1):165-74.
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: Claire M A Haworth; M J Wright; M Luciano; N G Martin; E J C de Geus; C E M van Beijsterveldt; M Bartels; D Posthuma; Dorret I Boomsma; O S P Davis; Yulia Kovas; R P Corley; John C DeFries; John K Hewitt; R K Olson; S-A Rhea; S J Wadsworth; W G Iacono; M McGue; Lee A Thompson; S A Hart; Stephen A Petrill; David Lubinski; Robert Plomin
The heritability of general cognitive ability increases linearly from childhood to young adulthood.
Molecular psychiatry 2010;15(11):1112-20.
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.
2010: John C DeFries
Haseman and Elston sib-pair linkage analysis: a brief historical note.
Behavior genetics 2010;40(1):1-2.
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 M Brant; Brett C Haberstick; Robin P Corley; Sally J Wadsworth; John C DeFries; John K Hewitt
The developmental etiology of high IQ.
Behavior genetics 2009;39(4):393-405.
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.
2008: Naomi P Friedman; Akira Miyake; Susan E Young; John C DeFries; Robin P Corley; John K Hewitt
Individual differences in executive functions are almost entirely genetic in origin.
Journal of experimental psychology. General 2008;137(2):201-25.
2008: Jesse L Hawke; Michael C Stallings; Sally J Wadsworth; John C DeFries
DeFries-Fulker and Pearson-Aitken model-fitting analyses of reading performance data from selected and unselected twin pairs.
Behavior genetics 2008;38(2):101-7.
2008: Soo Hyun Rhee; Erik G Willcutt; Christie A Hartman; Bruce F Pennington; John C DeFries
Test of alternative hypotheses explaining the comorbidity between attention-deficit/hyperactivity disorder and conduct disorder.
Journal of abnormal child psychology 2008;36(1):29-40.
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: L Cinnamon Bidwell; Erik G Willcutt; John C DeFries; Bruce F Pennington
Testing for neuropsychological endophenotypes in siblings discordant for attention-deficit/hyperactivity disorder.
Biological psychiatry 2007;62(9):991-8.
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: Raven L Astrom; Sally J Wadsworth; John C DeFries
Etiology of the stability of reading difficulties: the longitudinal twin study of reading disabilities.
Twin research and human genetics : the official journal of the International Society for Twin Studies 2007;10(3):434-9.
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: J B Bricker; Michael C Stallings; Robin P Corley; Sally J Wadsworth; A Bryan; David Timberlake; John K Hewitt; A Caspi; Scott Hofer; S A Rhea; John C DeFries
Genetic and environmental influences on age at sexual initiation in the Colorado Adoption Project.
Behavior genetics 2006;36(6):820-32.
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.
2006: Jesse L Hawke; Sally J Wadsworth; John C DeFries
Genetic influences on reading difficulties in boys and girls: the Colorado twin study.
Dyslexia (Chichester, England) 2006;12(1):21-9.
2006: Naomi P Friedman; Akira Miyake; Robin P Corley; Susan E Young; John C DeFries; John K Hewitt
Not all executive functions are related to intelligence.
Psychological science 2006;17(2):172-9.
2005: Sally J Wadsworth; John C DeFries
Genetic etiology of reading difficulties in boys and girls.
Twin research and human genetics : the official journal of the International Society for Twin Studies 2005;8(6):594-601.
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.
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: Stephen A Petrill; Paul A Lipton; John K Hewitt; Robert Plomin; Stacey Cherny; Robin Corley; John C DeFries
Genetic and environmental contributions to general cognitive ability through the first 16 years of life.
Developmental psychology 2004;40(5):805-12.
2004: Robert W Williams; Beth Bennett; Lu Lu; Jing Gu; John C DeFries; Phyllis J Carosone-Link; Brad A Rikke; John K Belknap; Thomas Johnson
Genetic structure of the LXS panel of recombinant inbred mouse strains: a powerful resource for complex trait analysis.
Mammalian genome : official journal of the International Mammalian Genome Society 2004;15(8):637-47.
2004: Jacqueline Hulslander; Joel B Talcott; Caroline Witton; John C DeFries; Bruce F Pennington; Sally Wadsworth; Erik G Willcutt; Richard Olson
Sensory processing, reading, IQ, and attention.
Journal of experimental child psychology 2004;88(3):274-95.
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.
2004: Norman D Henderson; Maria Grazia Turri; John C DeFries; Jonathan Flint
QTL analysis of multiple behavioral measures of anxiety in mice.
Behavior genetics 2004;34(3):267-93.
2004: Jonathan Flint; John C DeFries; Norman D Henderson
Little epistasis for anxiety-related measures in the DeFries strains of laboratory mice.
Mammalian genome : official journal of the International Mammalian Genome Society 2004;15(2):77-82.
2004: Maria Grazia Turri; John C DeFries; Norman D Henderson; Jonathan Flint
Multivariate analysis of quantitative trait loci influencing variation in anxiety-related behavior in laboratory mice.
Mammalian genome : official journal of the International Mammalian Genome Society 2004;15(2):69-76.
2003: Thomas G O'Connor; Avshalom Caspi; John C DeFries; Robert Plomin
Genotype-environment interaction in children's adjustment to parental separation.
Journal of child psychology and psychiatry, and allied disciplines 2003;44(6):849-56.
2002: Simon E Fisher; John C DeFries
Developmental dyslexia: genetic dissection of a complex cognitive trait.
Nature reviews. Neuroscience 2002;3(10):767-80.
2002: Sally J Wadsworth; Robin P Corley; John K Hewitt; Robert Plomin; John C DeFries
Parent-offspring resemblance for reading performance at 7, 12 and 16 years of age in the Colorado Adoption Project.
Journal of child psychology and psychiatry, and allied disciplines 2002;43(6):769-74.
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: Susan E Young; Andrew Smolen; Robin P Corley; Kenneth S Krauter; John C DeFries; Thomas J Crowley; John K Hewitt
Dopamine transporter polymorphism associated with externalizing behavior problems in children.
American journal of medical genetics 2002;114(2):144-9.
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: 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: Sally J Wadsworth; Robin P Corley; John K Hewitt; John C DeFries
Stability of genetic and environmental influences on reading performance at 7, 12, and 16 years of age in the Colorado Adoption Project.
Behavior genetics 2001;31(4):353-9.
2001: Maria Grazia Turri; Norman D Henderson; John C DeFries; Jonathan Flint
Quantitative trait locus mapping in laboratory mice derived from a replicated selection experiment for open-field activity.
Genetics 2001;158(3):1217-26.
2001: Maria Grazia Turri; S R Datta; John C DeFries; Norman D Henderson; Jonathan Flint
QTL analysis identifies multiple behavioral dimensions in ethological tests of anxiety in laboratory mice.
Current biology : CB 2001;11(10):725-34.
2000: Erik G Willcutt; Bruce F Pennington; John C DeFries
Twin study of the etiology of comorbidity between reading disability and attention-deficit/hyperactivity disorder.
American journal of medical genetics 2000;96(3):293-301.
2000: C J Davis; Valerie S Knopik; Sally J Wadsworth; John C DeFries
Self-reported reading problems in parents of twins with reading difficulties.
Twin research : the official journal of the International Society for Twin Studies 2000;3(2):88-91.
2000: Erik G Willcutt; Bruce F Pennington; John C DeFries
Etiology of inattention and hyperactivity/impulsivity in a community sample of twins with learning difficulties.
Journal of abnormal child psychology 2000;28(2):149-59.
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.
2000: M Alarcón; Bruce F Pennington; Pauline A Filipek; John C DeFries
Etiology of neuroanatomical correlates of reading disability.
Developmental neuropsychology 2000;17(3):339-60.
2000: Bruce F Pennington; Pauline A Filipek; DL Lefly; Nomita Chhabildas; David Nelson Kennedy; J H Simon; Christopher M Filley; A Galaburda; John C DeFries
A twin MRI study of size variations in human brain.
Journal of cognitive neuroscience 2000;12(1):223-32.
1999: Bruce F Pennington; Pauline A Filipek; DL Lefly; J Churchwell; David Nelson Kennedy; J H Simon; Christopher M Filley; A Galaburda; M Alarcon; John C DeFries
Brain morphometry in reading-disabled twins.
Neurology 1999;53(4):723-9.
1999: Valerie S Knopik; John C DeFries
Etiology of covariation between reading and mathematics performance: a twin study.
Twin research : the official journal of the International Society for Twin Studies 1999;2(3):226-34.
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: M Alarcón; Robert Plomin; DW Fulker; Robin Corley; John C DeFries
Multivariate path analysis of specific cognitive abilities data at 12 years of age in the Colorado Adoption Project.
Behavior genetics 1998;28(4):255-64.
1998: Robert Plomin; Robin Corley; Avshalom Caspi; DW Fulker; John C DeFries
Adoption results for self-reported personality: evidence for nonadditive genetic effects?
Journal of personality and social psychology 1998;75(1):211-8.
1998: J W Gilger; B F Pennington; R J Harbeck; John C DeFries; B Kotzin; P Green; S Smith
A twin and family study of the association between immune system dysfunction and dyslexia using blood serum immunoassay and survey data.
Brain and cognition 1998;36(3):310-33.
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.
1997: M Alarcón; John C DeFries; J G Light; Bruce F Pennington
A twin study of mathematics disability.
Journal of learning disabilities 1997;30(6):617-23.
1997: Valerie S Knopik; M Alarcón; John C DeFries
Comorbidity of mathematics and reading deficits: evidence for a genetic etiology.
Behavior genetics 1997;27(5):447-53.
1996: Paul Markel; DW Fulker; Beth Bennett; R P Corley; John C DeFries; V G Erwin; Thomas Johnson
Quantitative trait loci for ethanol sensitivity in the LS x SS recombinant inbred strains: interval mapping.
Behavior genetics 1996;26(4):447-58.
1996: S Schmitz; Kimberly J Saudino; Robert Plomin; DW Fulker; John C DeFries
Genetic and environmental influences on temperament in middle childhood: analyses of teacher and tester ratings.
Child development 1996;67(2):409-22.
1995: J Flint; R Corley; John C DeFries; DW Fulker; J A Gray; S Miller; A C Collins
A simple genetic basis for a complex psychological trait in laboratory mice.
Science (New York, N.Y.) 1995;269(5229):1432-5.
1995: L R Cardon; S D Smith; DW Fulker; W J Kimberling; Bruce F Pennington; John C DeFries
Quantitative trait locus for reading disability: correction.
Science (New York, N.Y.) 1995;268(5217):1553.
1995: Paul Markel; John C DeFries; Thomas Johnson
Use of repeated measures in an analysis of ethanol-induced loss of righting reflex in inbred long-sleep and short-sleep mice.
Alcoholism, clinical and experimental research 1995;19(2):299-304.
1995: J G Light; John C DeFries
Comorbidity of reading and mathematics disabilities: genetic and environmental etiologies.
Journal of learning disabilities 1995;28(2):96-106.
1995: Paul Markel; John C DeFries; Thomas Johnson
Ethanol-induced anesthesia in inbred strains of long-sleep and short-sleep mice: a genetic analysis of repeated measures using censored data.
Behavior genetics 1995;25(1):67-73.
1995: S D Casto; John C DeFries; DW Fulker
Multivariate genetic analysis of Wechsler Intelligence Scale for Children--Revised (WISC-R) factors.
Behavior genetics 1995;25(1):25-32.
1995: M Alarcón; John C DeFries; DW Fulker
Etiology of individual differences in reading performance: a test of sex limitation.
Behavior genetics 1995;25(1):17-23.
1995: S J Wadsworth; John C DeFries; DW Fulker; Robert Plomin
Cognitive ability and academic achievement in the Colorado Adoption Project: a multivariate genetic analysis of parent-offspring and sibling data.
Behavior genetics 1995;25(1):1-15.
1994: A Smolen; Michael J Marks; John C DeFries; N D Henderson
Individual differences in sensitivity to nicotine in mice: response to six generations of selective breeding.
Pharmacology, biochemistry, and behavior 1994;49(3):531-40.
1994: L R Cardon; S D Smith; DW Fulker; W J Kimberling; Bruce F Pennington; John C DeFries
Quantitative trait locus for reading disability on chromosome 6.
Science (New York, N.Y.) 1994;266(5183):276-9.
1994: Stacey Cherny; DW Fulker; R P Corley; Robert Plomin; John C DeFries
Continuity and change in infant shyness from 14 to 20 months.
Behavior genetics 1994;24(4):365-79.
1994: J W Gilger; I B Borecki; John C DeFries; Bruce F Pennington
Commingling and segregation analysis of reading performance in families of normal reading probands.
Behavior genetics 1994;24(4):345-55.
1993: S J Wadsworth; John C DeFries; DW Fulker
Cognitive abilities of children at 7 and 12 years of age in the Colorado adoption project.
Journal of learning disabilities 1993;26(9):611-5.
1993: Jim Stevenson; Bruce F Pennington; J W Gilger; John C DeFries; J J Gillis
Hyperactivity and spelling disability: testing for shared genetic aetiology.
Journal of child psychology and psychiatry, and allied disciplines 1993;34(7):1137-52.
1992: Robert N Emde; Robert Plomin; J A Robinson; R Corley; John C DeFries; DW Fulker; J S Reznick; J Campos; J Kagan; C Zahn-Waxler
Temperament, emotion, and cognition at fourteen months: the MacArthur Longitudinal Twin Study.
Child development 1992;63(6):1437-55.
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.
1992: Thomas Johnson; John C DeFries; Paul Markel
Mapping quantitative trait loci for behavioral traits in the mouse.
Behavior genetics 1992;22(6):635-53.
1992: S J Wadsworth; John C DeFries; Jim Stevenson; J W Gilger; Bruce F Pennington
Gender ratios among reading-disabled children and their siblings as a function of parental impairment.
Journal of child psychology and psychiatry, and allied disciplines 1992;33(7):1229-39.
1992: Stacey Cherny; John C DeFries; DW Fulker
Multiple regression analysis of twin data: a model-fitting approach.
Behavior genetics 1992;22(4):489-97.
1992: J J Gillis; J W Gilger; Bruce F Pennington; John C DeFries
Attention deficit disorder in reading-disabled twins: evidence for a genetic etiology.
Journal of abnormal child psychology 1992;20(3):303-15.
1992: Stacey Cherny; L R Cardon; DW Fulker; John C DeFries
Differential heritability across levels of cognitive ability.
Behavior genetics 1992;22(2):153-62.
1992: J W Gilger; Bruce F Pennington; John C DeFries
A twin study of the etiology of comorbidity: attention-deficit hyperactivity disorder and dyslexia.
Journal of the American Academy of Child and Adolescent Psychiatry 1992;31(2):343-8.
1992: J J Gillis; John C DeFries; DW Fulker
Confirmatory factor analysis of reading and mathematics performance: a twin study.
Acta geneticae medicae et gemellologiae 1992;41(4):287-300.
1991: Bruce F Pennington; J W Gilger; D Pauls; S A Smith; S D Smith; John C DeFries
Evidence for major gene transmission of developmental dyslexia.
JAMA : the journal of the American Medical Association 1991;266(11):1527-34.
1989: John C DeFries; J R Wilson; V G Erwin; D R Petersen
LS X SS recombinant inbred strains of mice: initial characterization.
Alcoholism, clinical and experimental research 1989;13(2):196-200.
1988: M C LaBuda; John C DeFries
Cognitive abilities in children with reading disabilities and controls: a follow-up study.
Journal of learning disabilities 1988;21(9):562-6.
1988: John C DeFries; DW Fulker
Multiple regression analysis of twin data: etiology of deviant scores versus individual differences.
Acta geneticae medicae et gemellologiae 1988;37(3-4):205-16.
1987: John C DeFries; DW Fulker; M C LaBuda
Evidence for a genetic aetiology in reading disability of twins.
Nature 1987;329(6139):537-9.
1986: M C LaBuda; John C DeFries; Robert Plomin; D W Fulker
Longitudinal stability of cognitive ability from infancy to early childhood: genetic and environmental etiologies.
Child development 1986;57(5):1142-50.
1986: M C LaBuda; John C DeFries; D W Fulker
Multiple regression analysis of twin data obtained from selected samples.
Genetic epidemiology 1986;3(6):425-33.
1983: R C Johnson; C T Nagoshi; F M Ahern; J R Wilson; John C DeFries; G E McClearn; S G Vandenberg
Family background, cognitive ability, and personality as predictors of educational and occupational attainment.
Social biology 1983;30(1):86-100.
1982: John C DeFries; R P Corley; R C Johnson; S G Vandenberg; J R Wilson
Sex-by-generation and ethnic group-by-generation interactions in the Hawaii family study of cognition.
Behavior genetics 1982;12(2):223-30.
1980: R P Corley; John C DeFries; A R Kuse; S G Vandenberg
Familial resemblance for the Identical Blocks Test of spatial ability: no evidence for X linkage.
Behavior genetics 1980;10(2):211-5.