| 1. |
- Garcia, Danilo, 1973, et al.
(författare)
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Responsibility and Cooperativeness Are Constrained, Not Determined
- 2014
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Ingår i: Frontiers in Psychology. - : Frontiers Media SA. - 1664-1078. ; 5
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Tidskriftsartikel (refereegranskat)abstract
- Neurobiological determinism has characterized later decades’ scientific approaches to the notion of free will. Scientists suggest that legal responsibility should be adjusted accordingly. We measured the genetic and environmental effects behind self-reported Self-directedness and Cooperativeness in a nation-wide population-based adolescent twin study. In spite of substantial overall genetic and shared environmental effects on these character scores, individual outcomes in both monozygotic and dizygotic co-twins of probands reporting severe personality problems varied widely into the normal range. Hence, even when constrained by genetic and environmental adversity, self-experienced responsibility and cooperation are not simply genetically determined but, to some extent, malleable.
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| 2. |
- Garcia, Danilo, 1973, et al.
(författare)
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Temperament and Character in the Child and Adolescent Twin Study in Sweden (CATSS): Comparison to the General Population, and Genetic Structure Analysis
- 2013
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Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 8:8
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Tidskriftsartikel (refereegranskat)abstract
- Background The Child and Adolescent Twin Study in Sweden (CATSS) is an on-going, large population-based longitudinal twin study. We aimed (1) to investigate the reliability of two different versions (125-items and 238-items) of Cloninger's Temperament and Character Inventory (TCI) used in the CATSS and the validity of extracting the short version from the long version, (2) to compare these personality dimensions between twins and adolescents from the general population, and (3) to investigate the genetic structure of Cloninger's model. Method Reliability and correlation analyses were conducted for both TCI versions, 2,714 CATSS-twins were compared to 631 adolescents from the general population, and the genetic structure was investigated through univariate genetic analyses, using a model-fitting approach with structural equation-modeling techniques based on same-sex twin pairs from the CATSS (423 monozygotic and 408 dizygotic pairs). Results The TCI scores from the short and long versions showed comparable reliability coefficients and were strongly correlated. Twins scored about half a standard deviation higher in the character scales. Three of the four temperament dimensions (Novelty Seeking, Harm Avoidance, and Persistence) had strong genetic and non-shared environmental effects, while Reward Dependence and the three character dimensions had moderate genetic effects, and both shared and non-shared environmental effects. Conclusions Twins showed higher scores in character dimensions compared to adolescents from the general population. At least among adolescents there is a shared environmental influence for all of the character dimensions, but only for one of the temperament dimensions (i.e., Reward Dependence). This specific finding regarding the existence of shared environmental factors behind the character dimensions in adolescence, together with earlier findings showing a small shared environmental effects on character among young adults and no shared environmental effects on character among adults, suggest that there is a shift in type of environmental influence from adolescence to adulthood regarding character.
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| 3. |
- Lester, Nigel, et al.
(författare)
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The genetic and environmental structure of the character sub-scales of the temperament and character inventory in adolescence.
- 2016
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Ingår i: Annals of General Psychiatry. - : Springer Science and Business Media LLC. - 1744-859X. ; 15
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The character higher order scales (self-directedness, cooperativeness, and self-transcendence) in the temperament and character inventory are important general measures of health and well-being [Mens Sana Monograph 11:16-24 (2013)]. Recent research has found suggestive evidence of common environmental influence on the development of these character traits during adolescence. The present article expands earlier research by focusing on the internal consistency and the etiology of traits measured by the lower order sub-scales of the character traits in adolescence.METHODS: The twin modeling analysis of 423 monozygotic pairs and 408 same sex dizygotic pairs estimated additive genetics (A), common environmental (C), and non-shared environmental (E) influences on twin resemblance. All twins were part of the on-going longitudinal Child and Adolescent Twin Study in Sweden (CATSS).RESULTS: The twin modeling analysis suggested a common environmental contribution for two out of five self-directedness sub-scales (0.14 and 0.23), for three out of five cooperativeness sub-scales (0.07-0.17), and for all three self-transcendence sub-scales (0.10-0.12).CONCLUSION: The genetic structure at the level of the character lower order sub-scales in adolescents shows that the proportion of the shared environmental component varies in the trait of self-directedness and in the trait of cooperativeness, while it is relatively stable across the components of self-transcendence. The presence of this unique shared environmental effect in adolescence has implications for understanding the relative importance of interventions and treatment strategies aimed at promoting overall maturation of character, mental health, and well-being during this period of the life span.
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| 4. |
- Nilsson, Thomas, 1954, et al.
(författare)
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Temperament and Character in Childhood-Onset Neurodevelopmental Disorders (Autism Spectrum Disorders and ADHD)
- 2019
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Ingår i: Personality and Brain Disorders: Associations and Interventions. - Cham, Switzerland : Springer. - 9783319900650 ; , s. 101-142
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Bokkapitel (refereegranskat)abstract
- Neurodevelopmental disorders, such as Autism Spectrum Disorders (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD), express aberrant neurocognitive functions in social communication, flexibility, and executive control from an early age, not seldom casting extensive consequences long into adulthood. They exist along a continuum from severe disorders to broader phenotypes or “shadow syndromes”. In recent years, several studies have assessed the relation between these conditions and associated personality traits in terms of Cloningers’ temperament and character model in both children and adults. The aim has been to clarify to what extent neurodevelopmental challenges are associated with adult personality and elucidate the link between symptom severity and specific personality traits. Findings give support for specific temperaments (previously known as constitutions) with high Novelty Seeking in ADHD and low Reward Dependence with high Harm Avoidance in ASD , while low scores on the character dimensions of Self-Directedness and Cooperativeness is a shared feature of both disorders (and more so the more severe the disorder is). This replicates previous findings of the same character deficits across adult mental disorders, forming a common ground for mental health problems. This pattern is proposed to be a window of opportunity for treatment interventions aiming at enhancing agency, communion, resilience and well-being.
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