Delineating physiologic defensive reactivity in the domain of self report: Phenotypic and etiologic structure of dispositional fear

Delineating physiologic defensive reactivity in the domain of self report : Phenotypic and etiologic structure of dispositional fear

Kramer, Mark, 1973- (author): University of Minnesota – Twin Cities, Minneapolis MN, USA

Patrick, C. J. (author): Florida State University, Department of Psychology, Tallahassee FL, USA

Krueger, R. F. (author): University of Minnesota – Twin Cities, Minneapolis MN, USA

Gasperi, M (author): University of Minnesota – Twin Cities, Minneapolis MN, USA

(creator_code:org_t)

Cambridge University Press, 2012
2012
English.
In: Psychological Medicine. - : Cambridge University Press. - 0033-2917 .- 1469-8978. ; 42:6, s. 1305-1320

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

Background: Individual differences in fear and fearlessness have been investigated at their extremes in relation to markedly different forms of psychopathology - anxiety disorders and psychopathy, respectively. A documented neural substrate of fear-related traits and disorders is defensive reactivity as reflected in aversive startle potentiation (ASP).Method: The current study extended prior work by characterizing, in a sample of adult twins from the community (n=2511), the phenotypic and etiologic structure of self-report measures of fear and fearlessness known to be associated with ASP.Results: Analyses revealed a hierarchical structure to the trait fear domain, with an overarching, bipolar fear/fearlessness dimension saturating each measure in this domain, and subfactors labeled 'distress,' 'stimulation seeking' and 'sociability' accounting for additional variance in particular measures. The structure of genetic and non-shared environmental associations among the measures closely mirrored the phenotypic structure of the domain.Conclusions: The findings have implications for proposals to reconceptualize psychopathology in neurobiological terms.

By the author/editor: Kramer, Mark, 19 ...; Patrick, C. J.; Krueger, R. F.; Gasperi, M

About the subject

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