Research Topics
Species | Wendy JohnsonSummaryAffiliation: University of Edinburgh Country: UK Publications
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Publications
Personality stability in late adulthood: a behavioral genetic analysisWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
J Pers 73:523-52. 2005..00 provided improved fit. The results suggest that the high stability of personality in later adulthood has a strong genetic foundation, supplemented by stability of environmental effects...- The psychological benefits of vigorous exercise: a study of discordant MZ twin pairsWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
Twin Res Hum Genet 10:275-83. 2007..The magnitude of the difference was in excess of .4 standard deviations... 
Personality in Germany and Minnesota: an IRT-based comparison of MPQ self-reportsWendy Johnson
Department of Psychology, University of Edinburgh
J Pers 76:665-706. 2008..IRT highlighted less than optimal scale properties as well as differentially functioning items. We discuss the theoretical implications of these findings...- Developmental genetics and psychopathology: some new feathers for a fine old hatWendy Johnson
University of Edinburgh and University of Minnesota Twin Cities, USA
Dev Psychopathol 24:1165-77. 2012..I then discuss the relevance of all of these to understanding genetic influences on personality and psychopathology... 
Genetic and environmental links between cognitive and physical functions in old ageWendy Johnson
Department of Psychology, University of Edinburgh, Scotland, UK
J Gerontol B Psychol Sci Soc Sci 64:65-72. 2009..27-0.65). The genetic correlation was .56 (95% confidence interval 0.15-1.00) and the nonshared environmental correlation .48 (95% confidence interval 0.35-0.61). We discuss several ways of interpreting these correlations...- Genetic and environmental transactions linking cognitive ability, physical fitness, and education in late lifeWendy Johnson
MRC Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, United Kingdom
Psychol Aging 24:48-62. 2009..Results provide some support for all 3 explanations for the physical-cognitive correlation and indicate the ways in which better education may support better function and lack of education may undermine it... - PPARG Pro12Ala genotype and risk of cognitive decline in elders? Maybe with diabetesWendy Johnson
Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh, EH8 9JZ, UK
Neurosci Lett 434:50-5. 2008..The data did suggest that risk of cognitive decline is greater when Pro12Ala carriers contract diabetes... - Most of the girls are alright, but some aren't: Personality trajectory groups from ages 14 to 24 and some associations with outcomesWendy Johnson
Department of Psychology, University of Edinburgh, Edinburgh, Scotland, UK
J Pers Soc Psychol 93:266-84. 2007..Trouble group members were more likely to be involved with drugs and alcohol, to display interpersonal problems, and to behave antisocially. Growing up group members fell in between... - School performance and genetic and environmental variance in antisocial behavior at the transition from adolescence to adulthoodWendy Johnson
Department of Psychology, University of Edinburgh, Edinburgh, UK
Dev Psychol 45:973-87. 2009..Antisocial characteristics involving school performance and educational attainment that transcend generations may slot individuals into social categories that restrict opportunities and reinforce antisocial characteristics... - No association of CETP genotype with cognitive function or age-related cognitive changeWendy Johnson
Department of Psychology, University of Edinburgh, Edinburgh, UK
Neurosci Lett 420:189-92. 2007..There were, however, no significant associations of CETP genotype with either childhood IQ or current cognitive function in old age, or with lifetime change in cognitive function... - Genetic and environmental influences on behavior: capturing all the interplayWendy Johnson
University of Edinburgh, Edinburgh, United Kingdom
Psychol Rev 114:423-40. 2007..They can be used to integrate findings from quantitative and molecular genetic studies and to understand the roles of genetic influences and social forces in manifested behaviors, even when DNA sequence variation is not relevant... - Education reduces the effects of genetic susceptibilities to poor physical healthWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, Edinburgh, UK
Int J Epidemiol 39:406-14. 2010..Little is known about the influence of education on variance in health status, or about how this influence may impact the underlying genetic and environmental sources of health problems. This study explored these influences... - Ankle--brachial index predicts level of, but not change in, cognitive function: the Edinburgh Artery Study at the 15-year follow-upWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, Edinburgh, UK
Vasc Med 15:91-7. 2010..In conclusion, over long time periods, low ABI may be associated with reduced cognitive function in older adults, at least partly because the associated poor health creates anxiety and depression... - The network perspective will help, but is comorbidity the question?Wendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, and Department of Psychology, University of Edinburgh, Edinburgh EH8 9JZ, United Kingdom
Behav Brain Sci 33:162-3. 2010..We note, however, that alone it cannot really help us understand etiology. Etiology, not comorbidity, is the fundamental question... - Family background buys an education in Minnesota but not in SwedenWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology and Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom
Psychol Sci 21:1266-73. 2010.... - Does education confer a culture of healthy behavior? Smoking and drinking patterns in Danish twinsWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, Universityof Edinburgh, Edinburgh, UK
Am J Epidemiol 173:55-63. 2011..Correlations between shared environmental influences on education and the health behaviors were substantial among the well-educated for smoking in both sexes and drinking in males, reinforcing this notion... - Education modifies genetic and environmental influences on BMIWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom
PLoS ONE 6:e16290. 2011..Family influence was particularly important in linking high education and lower levels of obesity... - Psychological and physical health at age 70 in the Lothian Birth Cohort 1936: links with early life IQ, SES, and current cognitive function and neighborhood environmentWendy Johnson
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh, UK
Health Psychol 30:1-11. 2011..Here, we evaluated the effects of early-life IQ on mental and physical health outcomes at age 70, in the context of effects of SES... - Heritability of fluctuating asymmetry in a human twin sample: the effect of trait aggregationWendy Johnson
Department of Psychology, University of Edinburgh, Edinburgh, United Kingdom
Am J Hum Biol 20:651-8. 2008..This is the case even when the estimates of fluctuating asymmetries of the individual traits do not differ significantly from 0... - Genetic effects on physical health: lower at higher income levelsWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, 75 East River Road, MN, Minneapolis 55455, USA
Behav Genet 35:579-90. 2005.... - Adolescent personality moderates genetic and environmental influences on relationships with parentsSusan C South
Department of Psychology, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
J Pers Soc Psychol 94:899-912. 2008..These findings support the importance of adolescent personality in the development of the quality of the parent-adolescent relationship... - Losing one's grip: a bivariate growth curve model of grip strength and nonverbal reasoning from age 79 to 87 years in the Lothian Birth Cohort 1921Ian J Deary
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh EH8 9JZ, UK
J Gerontol B Psychol Sci Soc Sci 66:699-707. 2011..Grip strength and reasoning are associated in old age. This is one of the few longitudinal studies addressing whether aging of one causes decline in the other or whether they share causal influences... - Stability and change in intelligence from age 11 to ages 70, 79, and 87: the Lothian Birth Cohorts of 1921 and 1936Alan J Gow
Department of Psychology, University of Edinburgh, Centre for Cognitive Ageing and Cognitive Epidemiology, Edinburgh EH8 9JZ, Scotland
Psychol Aging 26:232-40. 2011..It did not. Higher intelligence from early life was apparently protective of intelligence in old age due to the stability of cognitive function across the lifespan, rather than because it slowed the decline experienced in later life... - Are processing speed tasks biomarkers of cognitive aging?Ian J Deary
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, 7 George Square, Edinburgh EH8 9JZ, Scotland, United Kingdom
Psychol Aging 25:219-28. 2010..Inspection time, the marker that was least dependent on childhood intelligence, should be considered further as one biomarker of cognitive aging... - Genetic and environmental influences on academic achievement trajectories during adolescenceWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, MN 55455, USA
Dev Psychol 42:514-32. 2006.... - The environments of adopted and non-adopted youth: evidence on range restriction from the Sibling Interaction and Behavior Study (SIBS)Matt McGue
Department of Psychology, University of Minnesota, 75 East River Rd, Minneapolis, MN 55455, USA
Behav Genet 37:449-62. 2007..These data support the use of adoption studies to obtain direct estimates of the importance of shared environmental effects on psychological development... - Marriage and personality: a genetic analysisWendy Johnson
Department of Psychology, University of Minnesota, Twin Cities, Minneapolis, MN 55455, USA
J Pers Soc Psychol 86:285-94. 2004..The results suggest that propensity to marry is heritable and that the phenotypic link between personality and propensity to marry is genetically influenced... - Mental ability in childhood and cognitive agingAlan J Gow
Department of Psychology, University of Edinburgh, Edinburgh, UK
Gerontology 54:177-86. 2008..Identifying the determinants of cognitive aging is a research priority; however, few studies are able to examine the influence of pre-morbid cognitive ability on later changes in cognitive function... - Personality traits in old age: measurement and rank-order stability and some mean-level changeRené Mõttus
Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, Scotland
Psychol Aging 27:243-9. 2012..The older cohort scored higher on Agreeableness and Conscientiousness. In these cohorts, individual differences in personality traits continued to be stable even in very old age, mean-level changes accelerated... - Predictors of physical health: toward an integrated model of genetic and environmental antecedentsWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, Minneapolis, USA
J Gerontol B Psychol Sci Soc Sci 60:42-52. 2005..We discuss the implications of such mechanisms for differential expression of genetic variation in the population and suggest ways in which consideration of such effects can inform gerontology research... - The neuroscience of human intelligence differencesIan J Deary
Centre for Cognitive Ageing and Cognitive Epidemiology, Department of Psychology, University of Edinburgh, Edinburgh, Scotland, UK
Nat Rev Neurosci 11:201-11. 2010..There is also evidence that brain efficiency correlates positively with intelligence... - Higher perceived life control decreases genetic variance in physical health: evidence from a national twin studyWendy Johnson
Department of Psychology, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
J Pers Soc Psychol 88:165-73. 2005..They hypothesize that the mechanism underlying the interaction is the known biological relationship between metabolic efficiency and adaptation to stressful environments... - Intelligence and education: causal perceptions drive analytic processes and therefore conclusionsIan J Deary
Centre for Cognitive Ageing and Cognitive Epidemiology and Department of Psychology, University of Edinburgh, Scotland, UK
Int J Epidemiol 39:1362-9. 2010..We recommend greater clarity in stating underlying assumptions and developing analytical approaches and greater objectivity in interpreting results. We discuss implications for study designs... - The heritability of P300 amplitude in 18-year-olds is robust to adolescent alcohol useGreg Perlman
Department of Psychology, University of Minnesota, Minneapolis, Minnesota 55455, USA
Psychophysiology 46:962-9. 2009..This suggests that P3AR indexes risk for alcoholism independent of any deleterious effect of AAU on adolescent brain development... - The Minnesota Twin Registry: current status and future directionsRobert F Krueger
Minnesota Twin Registry, Department of Psychology, University of Minnesota, Twin Cities Campus, Minneapolis 55455 0344, USA
Twin Res 5:488-92. 2002..We outline major contributions that have resulted from Registry research, as well as current and future research directions... - Profiles of physical, emotional and psychosocial wellbeing in the Lothian birth cohort 1936Andrea R Zammit
Department of Psychology, Centre for Cognitive Aging and Cognitive Epidemiology, University of Edinburgh, 7 George Square, Edinburgh, EH8 9JZ, Scotland, UK
BMC Geriatr 12:64. 2012.... - How money buys happiness: genetic and environmental processes linking finances and life satisfactionWendy Johnson
University of Minnesota, MN 55455, USA
J Pers Soc Psychol 90:680-91. 2006..Finally, they showed that financial resources appeared to protect life satisfaction from environmental shocks. In addition, control appeared to act as a mechanism translating life circumstances into life satisfaction... - The personalities of twins: just ordinary folksWendy Johnson
University of Minnesota, Twin Cities, Minnetonka, MN 55391, USA
Twin Res 5:125-31. 2002..Our results also highlight the importance of replication in psychological research because each of our large samples showed differences not replicated in other samples...