PSY 3020 Module 2 Psychology of Emotions Paper: Theories, Universal Expressions and the Brain's Fear Circuits Example

A Racing Heart Before the Interview: Body, Label and Brain in Emotion

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Bachelor of Arts in Psychology, Thomas Edison State University

PSY-3020: Brain and Mind

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Month Day, Year

A Racing Heart Before the Interview: Body, Label and Brain in Emotion

Introduction

Waiting to be called for a job interview, I noticed my heart pounding, my hands damp and my stomach tight. I told myself I was nervous, but my friend, who had just finished her own interview, said she felt the same way and called it excitement. That conversation raised a question psychologists have argued about for more than a century: what makes a bodily state into a particular emotion? This paper compares major theories, examines evidence that some emotions are universal and describes what neuroscience has learned about the brain's fear system.

Three Classic Theories

The James-Lange theory, proposed in the 1880s, holds that emotion follows bodily change: we feel afraid because we notice our heart racing and our muscles tensing. The Cannon-Bard theory, developed in the 1920s, objected that bodily states are too slow and too similar across emotions to explain distinct feelings; it proposed that the brain produces the feeling and the bodily response at the same time. A third view, the two-factor theory, holds that emotion requires both physiological arousal and a cognitive label that explains it.

The Two-Factor Experiment

Schachter and Singer (1962) tested the two-factor theory by injecting participants with epinephrine, which produces a racing heart, flushing and trembling, or with a placebo, telling them it was a vitamin compound. Some participants who received epinephrine were accurately told what to expect, some were misinformed and some were told nothing. Each then waited with a confederate who acted either euphoric, playing games with paper and hoops, or angry, complaining about an insulting questionnaire. Participants who were aroused but had no explanation for their arousal were more likely to report and show the confederate's emotion than those who had been told about the drug's effects. The authors concluded that when people experience arousal they cannot explain, they look to their situation to label it, so the same arousal can become euphoria or anger.

Universal Expressions

If emotions were purely learned labels, facial expressions might vary from culture to culture. Ekman and Friesen (1971) traveled to the highlands of New Guinea to study members of the Fore, who at the time had little contact with Western media or people. Participants heard short stories, such as one about a person whose child had died, and chose which of several photographs of faces matched the story. The Fore matched happiness, sadness, anger, disgust and surprise to the same faces that Western participants chose, though they often confused fear with surprise. Ekman and Friesen argued that certain facial expressions of emotion are universal, which supports a biological component that labeling theories do not fully explain.

The Brain's Fear System

LeDoux (2000) reviewed research, much of it on fear conditioning in rats, showing that the amygdala is central to detecting threats and organizing defensive responses. Sensory information reaches the amygdala by two routes: a fast, crude pathway directly from the thalamus and a slower, more detailed route through the sensory cortex. The fast pathway allows the body to react, freezing or jumping back, before the cortex has fully identified the danger. The amygdala's central nucleus then triggers changes in heart rate, stress hormones and behavior. LeDoux distinguished these unconscious defensive processes from the conscious feeling of fear, which depends on other systems, including the cortex.

Culture and Display Rules

Ekman and Friesen's findings do not mean culture is irrelevant. People in every culture learn display rules, norms about when it is appropriate to show an emotion and how strongly. A face may express the same basic emotion everywhere, yet whether a person smiles at a funeral or hides anger from an elder depends on what they have learned.

Emotion Regulation

If interpretation shapes emotion, people can learn to change their emotional responses. Strategies include changing the situation, shifting attention and reappraising what an event means. Reappraisal, rethinking the meaning of a situation, is generally more effective than trying to suppress the feeling once it arises. Suppression can reduce visible expression while leaving the bodily arousal in place and can make conversations feel strained to others.

Putting the Pieces Together

The evidence suggests that no single classic theory is complete. LeDoux's fast pathway supports part of the James-Lange idea, since the body can react before we know what we feel. Ekman and Friesen's results suggest that some emotions have built-in expressions. Schachter and Singer show that interpretation matters, especially when arousal is ambiguous. Modern views combine these elements: brain systems produce bodily responses, and our understanding of the situation shapes the emotion we experience.

Back to the Interview

My pounding heart and my friend's were physically similar. Research on reappraisal suggests that telling oneself "I am excited" rather than "I am anxious" can improve performance under pressure, a practical application of the two-factor idea. At my next interview I tried it: the arousal stayed, but I interpreted it as energy rather than danger, and I spoke more easily. The experience showed me how much the label I chose shaped what I felt.

Limits

Schachter and Singer's findings have been difficult to replicate fully, and their sample was small. Ekman and Friesen's method of matching faces to stories may have guided participants toward expected answers, and later researchers debate how universal expressions are. Much fear research comes from animals, whose experience may differ from ours.

Conclusion

Schachter and Singer showed that people label unexplained arousal using their surroundings, Ekman and Friesen showed that basic facial expressions are recognized across cultures and LeDoux showed how the amygdala detects danger and prepares the body before conscious thought. Emotion emerges from biology and interpretation together, which is why the same racing heart can feel like dread or anticipation.

References

Ekman, P., & Friesen, W. V. (1971). Constants across cultures in the face and emotion. Journal of Personality and Social Psychology, 17(2), 124-129. https://doi.org/10.1037/h0030377

LeDoux, J. E. (2000). Emotion circuits in the brain. Annual Review of Neuroscience, 23, 155-184. https://doi.org/10.1146/annurev.neuro.23.1.155

Schachter, S., & Singer, J. (1962). Cognitive, social, and physiological determinants of emotional state. Psychological Review, 69(5), 379-399. https://doi.org/10.1037/h0046234