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Infrared thermal imaging: positive and negative emotions modify the skin temperatures of monkey and ape faces

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Infrared thermal imaging : positive and negative emotions modify the skin temperatures of monkey and ape faces. / Chotard, Helene; Ioannou, Stephanos; Davila Ross, Marina.

In: American Journal of Primatology, Vol. 80, No. 5, e22863, 01.05.2018.

Research output: Contribution to journalArticle

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Chotard, Helene ; Ioannou, Stephanos ; Davila Ross, Marina. / Infrared thermal imaging : positive and negative emotions modify the skin temperatures of monkey and ape faces. In: American Journal of Primatology. 2018 ; Vol. 80, No. 5.

Bibtex

@article{edf53e2c9ed044efab0c03c35be6789f,
title = "Infrared thermal imaging: positive and negative emotions modify the skin temperatures of monkey and ape faces",
abstract = "Facial thermography has enabled researchers to noninvasively and continuously measure the changes of a range of emotional states in humans. The present work used this novel technology to study the effect of positive and negative emotions in nonhuman primates by focusing on four facial areas (the peri-orbital area, the nose bridge, the nose tip and the upper lip). Monkeys and apes were examined for positive emotions (during interactions with toys and during tickling) and for negative emotions (during food delay and teasing). For the combined toy and tickling conditions, the results indicated a drop in the nose tip temperature and a tendency of an increase in the peri-orbital temperature. For the combined food delay and teasing conditions, the results also revealed a rise in the upper lip temperature of the subjects. These different effects on the facial temperatures in monkeys and apes most likely reflect distinctive physiological reactions of a primordial primate emotion system. We conclude that facial thermal imaging represents a promising physiologically-grounded technology to noninvasively and continuously obtain reliable data on emotional states in nonhuman primates, which may help modernize research on emotions in nonhuman primates and enhance our understanding of the evolution of human emotions.",
keywords = "deprivation, nonhuman primates, physiological and behavioral responses, play, thermography",
author = "Helene Chotard and Stephanos Ioannou and {Davila Ross}, Marina",
note = "12 month embargo.",
year = "2018",
month = "5",
day = "1",
doi = "10.1002/ajp.22863",
language = "English",
volume = "80",
journal = "American Journal of Primatology",
issn = "0275-2565",
publisher = "John Wiley and Sons Inc.",
number = "5",

}

RIS

TY - JOUR

T1 - Infrared thermal imaging

T2 - positive and negative emotions modify the skin temperatures of monkey and ape faces

AU - Chotard, Helene

AU - Ioannou, Stephanos

AU - Davila Ross, Marina

N1 - 12 month embargo.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Facial thermography has enabled researchers to noninvasively and continuously measure the changes of a range of emotional states in humans. The present work used this novel technology to study the effect of positive and negative emotions in nonhuman primates by focusing on four facial areas (the peri-orbital area, the nose bridge, the nose tip and the upper lip). Monkeys and apes were examined for positive emotions (during interactions with toys and during tickling) and for negative emotions (during food delay and teasing). For the combined toy and tickling conditions, the results indicated a drop in the nose tip temperature and a tendency of an increase in the peri-orbital temperature. For the combined food delay and teasing conditions, the results also revealed a rise in the upper lip temperature of the subjects. These different effects on the facial temperatures in monkeys and apes most likely reflect distinctive physiological reactions of a primordial primate emotion system. We conclude that facial thermal imaging represents a promising physiologically-grounded technology to noninvasively and continuously obtain reliable data on emotional states in nonhuman primates, which may help modernize research on emotions in nonhuman primates and enhance our understanding of the evolution of human emotions.

AB - Facial thermography has enabled researchers to noninvasively and continuously measure the changes of a range of emotional states in humans. The present work used this novel technology to study the effect of positive and negative emotions in nonhuman primates by focusing on four facial areas (the peri-orbital area, the nose bridge, the nose tip and the upper lip). Monkeys and apes were examined for positive emotions (during interactions with toys and during tickling) and for negative emotions (during food delay and teasing). For the combined toy and tickling conditions, the results indicated a drop in the nose tip temperature and a tendency of an increase in the peri-orbital temperature. For the combined food delay and teasing conditions, the results also revealed a rise in the upper lip temperature of the subjects. These different effects on the facial temperatures in monkeys and apes most likely reflect distinctive physiological reactions of a primordial primate emotion system. We conclude that facial thermal imaging represents a promising physiologically-grounded technology to noninvasively and continuously obtain reliable data on emotional states in nonhuman primates, which may help modernize research on emotions in nonhuman primates and enhance our understanding of the evolution of human emotions.

KW - deprivation

KW - nonhuman primates

KW - physiological and behavioral responses

KW - play

KW - thermography

U2 - 10.1002/ajp.22863

DO - 10.1002/ajp.22863

M3 - Article

VL - 80

JO - American Journal of Primatology

JF - American Journal of Primatology

SN - 0275-2565

IS - 5

M1 - e22863

ER -

ID: 10211518