Fear Odor Facilitates the Detection of Fear Expressions over other Negative Expressions

Fear Odor Facilitates the Detection of Fear Expressions over other Negative Expressions Abstract In a double-blind experiment, participants were exposed to facial images of anger, disgust, fear and neutral expressions under two body odor conditions: fear and neutral sweat. They had to indicate the valence of the gradually emerging facial image. Two alternative hypotheses were tested, namely a general negative evaluative state hypothesis and a discrete emotion hypothesis. These hypotheses suggest two distinctive data patterns for muscle activation and classification speed of facial expressions. The pattern of results that would support a discrete emotions perspective would be expected to reveal significantly increased activity in the medial frontalis (eyebrow raiser) and corrugator supercilii (frown) muscles associated with significantly decreased reaction times to only fear faces in the fear odor condition. Conversely, a pattern of results characterized by only a significantly increased corrugator supercilii activity together with decreased RTs for fear, disgust and anger faces in the fear odor condition would support an interpretation in line with a general negative evaluative state perspective. The data support the discrete emotion account for facial affect perception primed with fear odor. This study provides a first demonstration of perception of discrete negative facial expressions using olfactory priming. olfactory priming, fear odor, emotion categorization, face processing © The Author(s) 2018. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chemical Senses Oxford University Press

Fear Odor Facilitates the Detection of Fear Expressions over other Negative Expressions

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Publisher
Oxford University Press
Copyright
© The Author(s) 2018. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com
ISSN
0379-864X
eISSN
1464-3553
D.O.I.
10.1093/chemse/bjy029
Publisher site
See Article on Publisher Site

Abstract

Abstract In a double-blind experiment, participants were exposed to facial images of anger, disgust, fear and neutral expressions under two body odor conditions: fear and neutral sweat. They had to indicate the valence of the gradually emerging facial image. Two alternative hypotheses were tested, namely a general negative evaluative state hypothesis and a discrete emotion hypothesis. These hypotheses suggest two distinctive data patterns for muscle activation and classification speed of facial expressions. The pattern of results that would support a discrete emotions perspective would be expected to reveal significantly increased activity in the medial frontalis (eyebrow raiser) and corrugator supercilii (frown) muscles associated with significantly decreased reaction times to only fear faces in the fear odor condition. Conversely, a pattern of results characterized by only a significantly increased corrugator supercilii activity together with decreased RTs for fear, disgust and anger faces in the fear odor condition would support an interpretation in line with a general negative evaluative state perspective. The data support the discrete emotion account for facial affect perception primed with fear odor. This study provides a first demonstration of perception of discrete negative facial expressions using olfactory priming. olfactory priming, fear odor, emotion categorization, face processing © The Author(s) 2018. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices)

Journal

Chemical SensesOxford University Press

Published: May 22, 2018

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