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Domestic dogs' understanding of human emotional cues

By Min Hooi Yong

Category Theses
Abstract

Past research has focused on the ability of domestic dogs to recognise human communicative cues such as human pointing, eye gaze, attachment behaviour, social learning, and responses to affective stimuli. However, there is still much to be learned about dogs’ ability to recognise human emotions. The main objective of this study was to investigate whether domestic dogs understood the emotions expressed by a human experimenter. I examined four emotions (anger, sadness, fear, happiness) and three types of expressions (dynamic, unimodal, bimodal) in four studies. The four studies covered the following: (1) dogs’ response to commands accompanied by dynamic expressions of human happiness and anger; (2) dogs’ social referencing of human expressions of fear and happiness, and one control “confused” expression; (3) dogs’ and human infants’ preferential looking to angry, happy and sad human faces when listening to a matching emotion voice. In addition, infants’ facial expressions were analysed to examine whether their facial expressions differed as a result of the affective displays they viewed, and one additional control experiment was conducted to examine dogs’ ability to perform gender-matching of human faces to voices, and (4) dogs’ and young adult humans’ physiological (cortisol levels) and behavioural response to human infant crying, human infant babbling, and white noise. In Study 1, I found that dogs have differential responses to the experimenter’s happy and angry expressions emanating from the body, face or voice cues during the emoting phase, but not when left alone with food. In Study 2, dogs responded differentially to happiness and fearful expressions, but had similar responses to both fearful and control conditions, suggesting that they might not have understood the fearful expression meaningfully. Results from Study 3 showed that both dogs and infants looked less at sad faces (irrespective of the matching voice), and had no preference for looking at either happy or angry faces. Also, infants displayed a sad expression when viewing a sad face. For the gender-matching task, dogs were able to match male faces to voices, but not for female stimuli. Finally in Study 4, I found that both dogs and humans had increased cortisol levels after listening to a human infant crying but not to babbling or white noise. Dogs also showed a combination of alert and submissive behaviour when listening to crying. In conclusion, the results provided some evidence that dogs tended to respond differently to human emotional expressions and, similar to humans, may have an aversion to human expressions of sadness, indicating the presence of emotional contagion, a form of rudimentary empathy.

Submitter

Mason N McLary

HABRI Central

Date 2014
Pages 215
Publisher University of Otago
Location of Publication Dunedin, New Zealand
Department Psychology
Degree Philosophy
URL http://hdl.handle.net/10523/4938
Language English
Tags
  1. acoustic
  2. Anger
  3. Animal roles
  4. Animals in culture
  5. Attention
  6. bimodal
  7. Depression
  8. Dogs
  9. dynamic
  10. Emotions
  11. Empathy
  12. expressions
  13. Fear
  14. Gender
  15. Happiness
  16. joint
  17. Mammals
  18. perceptions
  19. Pet ownership
  20. Pets and companion animals
  21. referencing
  22. social
  23. unimodal