May13th2008 - Darwin and Animal Behavior Expression of...

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1 Emotion Darwin and Animal Behavior ± Expression of Emotions in Man and Animals ± In this book, Darwin reported numerous observations in support of the view that the expression of the emotions in humans and animals represents a continuum. ± Indeed, some patterns of expression in humans were regarded as resulting from the inheritance of behaviors that were useful in our ancestors Darwin • Behaviors that appear homologous to emotions observed in many species – Predicted that human emotions should be similar across cultures Figure 15.9 Facial Expression of Emotions in Nonhuman Primates After Darwin • Progress in studying emotions was slow – Lack of tools (especially in humans) – Skepticism that emotions could be studied How Many Emotions Do We Experience? Paul Ekman Traveled around the world and asked people to identify emotions based on facial expressions
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2 Figure 15.3 Universal Facial Expressions of Emotion Figure 15.4 Cultural Differences in Recognizing Facial Expressions of Emotion How Many Emotions Do We Experience? There is cross-cultural similarity in expression production , but there are culture-specific differences in display. Similarities : suggest a genetic component Differences : suggest a environment a component Post-Traumatic Stress Disorder Post-Traumatic Stress Disorder • An anxiety disorder that can develop after exposure to a terrifying event or ordeal in which grave physical harm occurred or was threatened • Persistent frightening thoughts & memories, feel emotionally numb, sleep problems, easily startled Why is it hard to forget? • Generally it makes sense to remember situations that can harm you – Can avoid it in the future • Humans are not the only species that does not forget aversive events easily
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3 Fear Conditioning • Rats are trained to associate a tone with a mild foot shock (causes freezing) • After training, rats will freeze when hearing the tone
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This note was uploaded on 09/13/2010 for the course PSC Psychology taught by Professor Cossowings during the Spring '08 term at UC Davis.

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May13th2008 - Darwin and Animal Behavior Expression of...

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