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Startle eye-blink modulation by facial self-resemblance and current mood.

Identifieur interne : 000775 ( Ncbi/Curation ); précédent : 000774; suivant : 000776

Startle eye-blink modulation by facial self-resemblance and current mood.

Auteurs : Johannes B. Finke [Allemagne] ; Mauro F. Larra [Allemagne] ; Thomas M. Schilling [Allemagne] ; Johanna Lass-Hennemann [Allemagne] ; Terry D. Blumenthal [États-Unis] ; Hartmut Sch Chinger [Allemagne]

Source :

International journal of psychophysiology : official journal of the International Organization of Psychophysiology [ 1872-7697 ] ; 2015.

RBID : pubmed:25913094

English descriptors

KwdEn :
- Adult, Affect, Analysis of Variance, Blinking (physiology), Electrocardiography, Electromyography, Evoked Potentials (physiology), Facial Expression, Female, Humans, Male, Photic Stimulation, Reflex, Startle (physiology), Time Factors, Young Adult.
MESH :
- physiology : Blinking, Evoked Potentials, Reflex, Startle.
- Adult, Affect, Analysis of Variance, Electrocardiography, Electromyography, Facial Expression, Female, Humans, Male, Photic Stimulation, Time Factors, Young Adult.

Abstract

Although salient stimuli are known to modulate startle eye-blink responses, and one's own face is considered of particular salience, effects of facial self-resemblance on startle responsiveness have not been systematically investigated. For the present study, pictures from the FACES database (rated as neutral) were digitally morphed to resemble the participants' (N=37) faces to varying degrees (25-50-75%). Perceptually matched geometrical shapes served as a control condition. At SOAs of either 300ms or 3000ms after picture onset, startle responses were elicited by white noise (50ms, 105dB), and recorded at the orbicularis oculi via EMG. Prior to the experiment, self-reported mood was assessed by means of the PANAS. Relative to non-face stimuli, the presentation of faces reduced startle magnitude at short, but not long, lead intervals. Furthermore, for probes presented at a SOA of 300ms, a linear decrease in startle magnitude with higher levels of self-resemblance was observed, presumably reflecting higher salience of the self-face. The startle modulating effect of self-resembling faces during longer lead intervals was moderated by the participants' current mood: negative affect predicted stronger patterns of attenuation, which might be interpreted as an increase in self-focus resulting from more negative mood.

DOI: 10.1016/j.ijpsycho.2015.04.009
PubMed: 25913094

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pubmed:25913094

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<front><div type="abstract" xml:lang="en">Although salient stimuli are known to modulate startle eye-blink responses, and one's own face is considered of particular salience, effects of facial self-resemblance on startle responsiveness have not been systematically investigated. For the present study, pictures from the FACES database (rated as neutral) were digitally morphed to resemble the participants' (N=37) faces to varying degrees (25-50-75%). Perceptually matched geometrical shapes served as a control condition. At SOAs of either 300ms or 3000ms after picture onset, startle responses were elicited by white noise (50ms, 105dB), and recorded at the orbicularis oculi via EMG. Prior to the experiment, self-reported mood was assessed by means of the PANAS. Relative to non-face stimuli, the presentation of faces reduced startle magnitude at short, but not long, lead intervals. Furthermore, for probes presented at a SOA of 300ms, a linear decrease in startle magnitude with higher levels of self-resemblance was observed, presumably reflecting higher salience of the self-face. The startle modulating effect of self-resembling faces during longer lead intervals was moderated by the participants' current mood: negative affect predicted stronger patterns of attenuation, which might be interpreted as an increase in self-focus resulting from more negative mood.</div>
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Startle eye-blink modulation by facial self-resemblance and current mood.

Startle eye-blink modulation by facial self-resemblance and current mood.

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English descriptors

Abstract

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