Blunted startle reactivity in everyday sadism and psychopathy.


Journal

Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288

Informations de publication

Date de publication:
30 08 2023
Historique:
received: 08 02 2023
accepted: 18 08 2023
medline: 1 9 2023
pubmed: 31 8 2023
entrez: 30 8 2023
Statut: epublish

Résumé

Two studies examined the amplitude of the startle response as a function of the Dark Tetrad of personality (narcissism, Machiavellianism, psychopathy, and sadism). We measured electromyographic activity of the orbicularis oculi muscle evoked by a startle stimulus while participants viewed images on a computer screen. Both studies revealed a negative correlation between general startle reactivity (averaged across positive, negative, and neutral images) and sadistic tendencies. In Study 2, all four dark traits were negative correlates of general startle reactivity. Study 2 also examined the personality correlates of aversive startle potentiation (ASP; indexed by greater reactivity while viewing negatively-valenced images than positive or neutral images). ASP correlated negatively with a variety of personality measures of psychopathy and sadism, their facets, and related personality tendencies (callousness, risk-taking, and restricted affect). These findings suggest that ordinary people with high levels of callousness and antagonism display physiological evidence of non-reactivity (i.e., blunted acoustic startle in general), whereas psychopathy and sadism are preferentially associated with reduced ASP.

Identifiants

pubmed: 37648765
doi: 10.1038/s41598-023-41043-2
pii: 10.1038/s41598-023-41043-2
pmc: PMC10469178
doi:

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

14216

Informations de copyright

© 2023. Springer Nature Limited.

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Auteurs

Erin E Buckels (EE)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada. e.buckels@uwinnipeg.ca.

Douglas A Williams (DA)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada.

Paul D Trapnell (PD)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada.

Siavash Kermani Koosheh (S)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada.

Owen M Javra (OM)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada.

Sasha C Svenne (SC)

Department of Psychology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada.

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