John Loehlin | The University of Texas at Austin (original) (raw)
Papers by John Loehlin
American Psychologist, 1996
Twin research and human genetics : the official journal of the International Society for Twin Studies, 2015
We tested a hypothesis that there is no genetic correlation between general factors of intelligen... more We tested a hypothesis that there is no genetic correlation between general factors of intelligence and personality, despite both having been selected for in human evolution. This was done using twin samples from Australia, the United States, the Netherlands, Great Britain, and Croatia, comprising altogether 1,748 monozygotic and 1,329 same-sex dizygotic twin pairs. Although parameters in the model-fitting differed among the twin samples, the genetic correlation between the two general factors could be set to zero, with a better fit if the U.S. sample was excepted.
Twin research and human genetics : the official journal of the International Society for Twin Studies, 2014
The reported genetic correlation of 1.0 between the traits of procrastination and impulsivity (Gu... more The reported genetic correlation of 1.0 between the traits of procrastination and impulsivity (Gustavson, D. E., Miyake, A., Hewitt, J. K., & Friedman, N. P. (2014). Psychological Science), which was held to support an evolutionary origin of the relationship between the two traits, was tested in data from two large samples of twins from Australia. A genetic correlation of 0.299 was obtained. It was concluded that, although the presence of a genetic correlation between the two traits was supported, the modest magnitude of the correlation was such as to be consistent with many possible hypotheses, evolutionary and otherwise, about causal relationships between the traits in question.
Journal of Research in Personality, 1998
Three different measures of the Big Five personality dimensions were developed from the battery o... more Three different measures of the Big Five personality dimensions were developed from the battery of questionnaires used in the National Merit Twin Study: one from trait self-rating scales, one from personality inventory items, and one from an adjective check list. Behavior-genetic models were fit to what the three measures had in common, and to the variance distinctive to each. The
Developmental Psychology, 1985
We suggest that correlations between environmental measures and child behavior often have both ge... more We suggest that correlations between environmental measures and child behavior often have both genetic and environmental components, and we propose a simple model to test this hypothesis. Data from classical adoption studies and new data from the Colorado Adoption Project are used to illustrate the model and to provide quantitative estimates of the genetic and environmental components of environment-behavior correlations.
Archives of sexual behavior, 2003
Psychological Bulletin, 1977
Personality and Individual Differences, 2008
... Sarah E. Medland a , b , Corresponding Author Contact Information , E-mail The Corresponding ... more ... Sarah E. Medland a , b , Corresponding Author Contact Information , E-mail The Corresponding Author , John C. Loehlin c and Nicholas G. Martin a. ... There have been at least three recent studies in which the 2D:4D ratios of dizygotic (DZ) twins with same-and opposite-sex co ...
Developmental Psychology, 1992
Page 1. Developmental Psychology 1992, Vol. 28, No. 2,261-272 Copyright 1992 by the American Psyc... more Page 1. Developmental Psychology 1992, Vol. 28, No. 2,261-272 Copyright 1992 by the American Psychological Association, Inc. 0O12-1649/92/S3.0O Infant Perception of/aba/ Versus /apa/. Building a Quantitative Model of Infant Categorical Discrimination ...
Developmental Psychology, 1985
We suggest that correlations between environmental measures and child behavior often have both ge... more We suggest that correlations between environmental measures and child behavior often have both genetic and environmental components, and we propose a simple model to test this hypothesis. Data from classical adoption studies and new data from the Colorado Adoption Project are used to illustrate the model and to provide quantitative estimates of the genetic and environmental components of environment-behavior correlations.
Behavior Genetics, 1973
... John C. Loehlin, 1 Steven G. Vandenberg, 2 and R. Travis Osborne 3 Received 10 Dec. 19 72-Fin... more ... John C. Loehlin, 1 Steven G. Vandenberg, 2 and R. Travis Osborne 3 Received 10 Dec. 19 72-Final 9 March 19 73 Data on samples of 40 and 44 Negro adolescents from two twin studies were used to test Shockley's hypothesis that blood group genes more characteristic of ...
Behavior Genetics, 1987
Estimated true scores are occasionally used to provide an estimate of scores which would be obtai... more Estimated true scores are occasionally used to provide an estimate of scores which would be obtained if measurement error could be removed from fallible measures. When one knows only a test's relibility and an observed score for each subject, true scores are estimated by regressing observed scores toward the group mean. When relatives' observed scores are also available, estimates of true scores can be improved by using the additional information. Observed scores of subjects and relatives can be used as predictors of subjects' true scores in a multiple regression. The resulting formula is presented for the case in which only one relative's score per subject is known. Estimation of true scores for the general case ofN relatives per subject is also discussed.
Archives of Sexual Behavior, 2005
American Psychologist, 1996
Twin research and human genetics : the official journal of the International Society for Twin Studies, 2015
We tested a hypothesis that there is no genetic correlation between general factors of intelligen... more We tested a hypothesis that there is no genetic correlation between general factors of intelligence and personality, despite both having been selected for in human evolution. This was done using twin samples from Australia, the United States, the Netherlands, Great Britain, and Croatia, comprising altogether 1,748 monozygotic and 1,329 same-sex dizygotic twin pairs. Although parameters in the model-fitting differed among the twin samples, the genetic correlation between the two general factors could be set to zero, with a better fit if the U.S. sample was excepted.
Twin research and human genetics : the official journal of the International Society for Twin Studies, 2014
The reported genetic correlation of 1.0 between the traits of procrastination and impulsivity (Gu... more The reported genetic correlation of 1.0 between the traits of procrastination and impulsivity (Gustavson, D. E., Miyake, A., Hewitt, J. K., & Friedman, N. P. (2014). Psychological Science), which was held to support an evolutionary origin of the relationship between the two traits, was tested in data from two large samples of twins from Australia. A genetic correlation of 0.299 was obtained. It was concluded that, although the presence of a genetic correlation between the two traits was supported, the modest magnitude of the correlation was such as to be consistent with many possible hypotheses, evolutionary and otherwise, about causal relationships between the traits in question.
Journal of Research in Personality, 1998
Three different measures of the Big Five personality dimensions were developed from the battery o... more Three different measures of the Big Five personality dimensions were developed from the battery of questionnaires used in the National Merit Twin Study: one from trait self-rating scales, one from personality inventory items, and one from an adjective check list. Behavior-genetic models were fit to what the three measures had in common, and to the variance distinctive to each. The
Developmental Psychology, 1985
We suggest that correlations between environmental measures and child behavior often have both ge... more We suggest that correlations between environmental measures and child behavior often have both genetic and environmental components, and we propose a simple model to test this hypothesis. Data from classical adoption studies and new data from the Colorado Adoption Project are used to illustrate the model and to provide quantitative estimates of the genetic and environmental components of environment-behavior correlations.
Archives of sexual behavior, 2003
Psychological Bulletin, 1977
Personality and Individual Differences, 2008
... Sarah E. Medland a , b , Corresponding Author Contact Information , E-mail The Corresponding ... more ... Sarah E. Medland a , b , Corresponding Author Contact Information , E-mail The Corresponding Author , John C. Loehlin c and Nicholas G. Martin a. ... There have been at least three recent studies in which the 2D:4D ratios of dizygotic (DZ) twins with same-and opposite-sex co ...
Developmental Psychology, 1992
Page 1. Developmental Psychology 1992, Vol. 28, No. 2,261-272 Copyright 1992 by the American Psyc... more Page 1. Developmental Psychology 1992, Vol. 28, No. 2,261-272 Copyright 1992 by the American Psychological Association, Inc. 0O12-1649/92/S3.0O Infant Perception of/aba/ Versus /apa/. Building a Quantitative Model of Infant Categorical Discrimination ...
Developmental Psychology, 1985
We suggest that correlations between environmental measures and child behavior often have both ge... more We suggest that correlations between environmental measures and child behavior often have both genetic and environmental components, and we propose a simple model to test this hypothesis. Data from classical adoption studies and new data from the Colorado Adoption Project are used to illustrate the model and to provide quantitative estimates of the genetic and environmental components of environment-behavior correlations.
Behavior Genetics, 1973
... John C. Loehlin, 1 Steven G. Vandenberg, 2 and R. Travis Osborne 3 Received 10 Dec. 19 72-Fin... more ... John C. Loehlin, 1 Steven G. Vandenberg, 2 and R. Travis Osborne 3 Received 10 Dec. 19 72-Final 9 March 19 73 Data on samples of 40 and 44 Negro adolescents from two twin studies were used to test Shockley's hypothesis that blood group genes more characteristic of ...
Behavior Genetics, 1987
Estimated true scores are occasionally used to provide an estimate of scores which would be obtai... more Estimated true scores are occasionally used to provide an estimate of scores which would be obtained if measurement error could be removed from fallible measures. When one knows only a test's relibility and an observed score for each subject, true scores are estimated by regressing observed scores toward the group mean. When relatives' observed scores are also available, estimates of true scores can be improved by using the additional information. Observed scores of subjects and relatives can be used as predictors of subjects' true scores in a multiple regression. The resulting formula is presented for the case in which only one relative's score per subject is known. Estimation of true scores for the general case ofN relatives per subject is also discussed.
Archives of Sexual Behavior, 2005