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🧠 EMOTION - Complete Study Notes
📋 LEARNING OUTCOMES
By the end of this lecture, students should be able to:
- Define emotion and aggression
- Define and describe different components in the physiology of emotion
- Compare and contrast the three theories of emotion
- Determine the role of emotion in health
- Describe emotional intelligence
SECTION 1 - DEFINITION OF EMOTION
What is Emotion?
- Emotion gives colour, meaning, and intensity to our lives
- Makes art, films, poetry, and novels enjoyable and relatable
- Plutchik (1982) defined emotion as:
"An inferred complex sequence of reactions to a stimulus including cognitive evaluations, subjective changes, autonomic and neural arousal, impulses to action, and behavior designed to have an effect upon the stimulus that initiated the complex sequence."
- This definition is useful but not complete - emotion is difficult to define with precision
How Many Emotions Are There?
- There are many named emotions (joy, fear, sadness, anger, surprise, disgust, etc.)
- The list is considered endless
Map of Emotion (Tellegen, Watson & Clark, 1999)
- Emotions are related to one another and can be mapped on a grid
- Key dimensions:
- Level of neuronal arousal (high vs. low)
- Valence (pleasant vs. unpleasant)
- Example: high arousal + unpleasant = fear/anger; high arousal + pleasant = excitement/joy
SECTION 2 - PHYSIOLOGY OF EMOTION
Action Tendency and States of Arousal
- Every emotional state includes a readiness for action (called "action tendency")
- Anger → readiness to attack
- Joy → readiness to jump up and hug people
- Getting ready for action requires activation of the Sympathetic Nervous System (SNS)
- Highly active SNS = intense/high arousal
- Inactive SNS = low arousal
Role of the Nervous System in Emotional States
| System | Function |
|---|
| Sympathetic Nervous System (SNS) | Prepares the body for "fight or flight" - increases heart rate, BP, adrenaline |
| Parasympathetic Nervous System (PNS) | Does maintenance functions - conserves energy, facilitates growth and development (rest & digest) |
The Polygraph (Lie-Detector Test)
- A device that measures physiological responses: blood pressure, heart rate, breathing rate, sweating
- Based on the assumption that lying causes emotional arousal and therefore physiological changes
- Uses the Guilty Knowledge Test (GKT):
- Asks questions only the guilty party would know the answers to
- Monitors physiological response to identify guilt
- Limitations:
- People respond differently to questions (some innocent people show arousal, some guilty people do not)
- It is inaccurate and therefore no longer used in courts
SECTION 3 - THEORIES OF EMOTION
The 4 Basic Elements of Emotion
For emotion to arise, four elements are needed:
- Stimulus - a person, creature, event, or situation
- Conscious experience - what we feel (positive or negative)
- Physiological arousal - produced by the nervous system
- Behaviour - the action produced
Psychologists agree on these 4 elements but disagree on the order in which they occur.
Theory 1 - Common Sense View
Event → Emotional Feeling → Action
- The "everyday" understanding: something happens, we feel it, then we act
- Psychologists challenged this linear view
Theory 2 - James-Lange Theory (1880s)
Proposed by: William James (American psychologist) & Carl Lange (Danish psychologist), independently, around the 1880s
Key Principle: Event → Action → Emotional Feeling
Famous quote:
"We feel sorry because we cry, angry because we strike, afraid because we tremble."
Detailed mechanism:
| Step | What Happens |
|---|
| Stimulus | Seeing a snake; signal sent to the thalamus |
| Thalamus | Relays message to the limbic system |
| Action | Limbic system activates the SNS & hypothalamus → autonomic arousal → running away |
| Feeling | Sensations from muscles and internal organs are fed back to the cortex → conscious experience of FEAR |
- The physical response comes first - the emotion (feeling) is the brain's interpretation of the body's reaction
Theory 3 - Cannon-Bard Theory
Proposed by: Walter Cannon (physiologist), later revised by Philip Bard - hence "Cannon-Bard Theory"
Key Principle: Conscious emotional experience and physiological arousal are two simultaneous and independent events
Mechanism:
Event → Action (behaviour & bodily reactions)
↘ Feelings
- Both the bodily response AND the emotional feeling happen at the same time, triggered by the same event
- Critiqued James-Lange by arguing you don't need to feel the body react first to feel emotion
Theory 4 - Cognitive Theory
Proposed by: Magda Arnold (1960), Albert Ellis (1962), Stanley Schachter & Jerome Singer (1962)
Key Principle: The cognitive interpretation of the emotional stimulus is the key event
Mechanism:
Event → Interpretation of stimulus & bodily response → Feelings
- It is not the event itself, but what the stimulus and body arousal MEAN to you that produces emotion
- Two people can experience the same event and feel different emotions based on their interpretation
Comparison of the Three Main Theories
| Theory | Order of Events | Key Idea |
|---|
| James-Lange | Event → Action → Feeling | Physical reaction comes first; feeling follows body response |
| Cannon-Bard | Event → Action AND Feeling simultaneously | Both happen at the same time, independently |
| Cognitive | Event → Interpretation → Feeling | How you interpret the event determines your emotion |
SECTION 4 - ANGER AND AGGRESSION
What is Anger?
- Anger is an example of an emotion
- It is an emotional state associated with a desire to hurt someone or drive them away
- It is a response to events or conditions that are:
- Unpleasant
- Unfair
- Potentially changeable
- People who habitually interpret events as malicious or hostile tend to get angry more often, which can lead to aggression
What is Aggression?
Aggression is behaviour intended to harm another person. Three major theories explain it:
| Theory | Explanation |
|---|
| Freud's Theory | Aggression is the release of an inborn aggressive instinct - we are naturally aggressive |
| Frustration-Aggression Theory | Aggression is an inborn reaction to aversive events such as frustration, pain, and heat |
| Social Learning Theory | Aggression is not inborn - it is a learned behaviour acquired through observation and reinforcement |
Reducing Violence/Aggression:
- Freud suggested catharsis (releasing aggression in a safe way, e.g., exercise or venting)
- Recent research supports the Social Learning Theory - the best way to reduce violence is to reduce violent environments (e.g., less exposure to violent media, role models)
SECTION 5 - ROLE OF EMOTION IN HEALTH
What is Health?
- WHO Definition of Health:
"Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity."
- WHO Definition of Mental Health:
"A state of well-being in which every individual realizes his or her own potential, can cope with the normal stresses of life, can work productively and fruitfully, and is able to make a contribution to her or his community."
How Emotion Affects Health:
- Inability to manage emotion leads to a life full of anger, sadness, or fear → STRESS
- Stress can negatively affect both mental and physical health
- Managing emotions is therefore critical to living a healthy life
SECTION 6 - EMOTIONAL INTELLIGENCE
Are Emotions Bad?
- Old view: Emotions are disruptive and dangerous and drive us toward undesirable behaviours
- Modern view: Emotions are also helpful - they:
- Help us make quick and useful decisions
- Help us remember better
- Enable empathy, which is necessary in caring professions (medicine, nursing, counselling)
- The challenge is knowing when to follow gut feelings and when to discard them
What is Emotional Intelligence?
Definition (Mayer, Caruso & Salovey, 2000):
"The ability to recognise the meanings of emotions and their relationships and to use emotions effectively in reasoning and problem solving."
In simple terms: the ability to quickly read a person's emotional state and then say or do the right thing.
Three Components of Emotional Intelligence:
| Component | Description |
|---|
| 1. Perceiving Emotion | Recognizing emotions in facial expressions, music, art, etc. |
| 2. Understanding & Reasoning about Emotion | Making sense of why emotions occur and how they relate to situations |
| 3. Managing Emotion | Calming yourself down, relieving other people's sadness or anxiety |
Outcomes of High Emotional Intelligence:
- Fewer conflicts and less frustration
- More likeable to others
- Better relationships and decision-making
📝 TAKE HOME MESSAGE (Summary)
- Emotion is a complex reaction - its components include: stimulus, physiological reaction, behaviour, and conscious experience of feeling
- The three main theories of emotion are: James-Lange Theory, Cannon-Bard Theory, and Cognitive Theory
- Anger is one important example of emotion that can lead to aggression - three main theories explain aggression (Freud, Frustration-Aggression, Social Learning)
- To live healthily, we need to learn to handle our emotions - this is emotional intelligence
Quick Exam Tip: The most commonly tested area is the comparison between the three theories of emotion - know the order of events and key thinker for each. Also memorize the three components of emotional intelligence (Perceiving, Understanding, Managing).