Hostname: page-component-89b8bd64d-nlwjb Total loading time: 0 Render date: 2026-05-11T08:50:14.382Z Has data issue: false hasContentIssue false

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

Published online by Cambridge University Press:  19 October 2011

M. D. Kramer
Affiliation:
University of Minnesota – Twin Cities, Minneapolis, MN USA
C. J. Patrick*
Affiliation:
Florida State University, Department of Psychology, Tallahassee, FL, USA
R. F. Krueger
Affiliation:
University of Minnesota – Twin Cities, Minneapolis, MN USA
M. Gasperi
Affiliation:
University of Minnesota – Twin Cities, Minneapolis, MN USA
*
*Address for correspondence: Dr C. J. Patrick, Florida State University, Department of Psychology, 1107 West Call Street, Tallahassee, FL 32306-4301, USA. (Email: cpatrick@psy.fsu.edu)

Abstract

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.

Information

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable