Personality Psychology

Approaches to Studying Personality

Personality refers to the characteristic patterns of thinking, feeling, and behaving that are unique to an individual and remain relatively constant over time. Psychologists use different approaches to study personality:

• Idiographic Approach: Focuses on detailed descriptions of unique personality traits in individuals.

• Nomothetic Approach: Examines large groups to make generalizations about personality structure.

The Five-Factor Model (OCEAN)

The Five-Factor Model, also known as OCEAN, is the most widely accepted framework for understanding personality traits:

• Openness: Interest in a variety of experiences; associated with creativity and imagination.

• Conscientiousness: Tendency to be organized, responsible, and hardworking; correlated with better health and sleep.

• Extraversion: Sociability, assertiveness, and positive emotionality.

• Agreeableness: Empathy, trust, and awareness of social norms.

• Neuroticism: Emotional instability and tendency toward negative emotions; lower scores indicate greater stability.

Beyond OCEAN: Honesty-Humility and the Dark Triad

• Honesty-Humility (HH): Added to address traits related to sincerity and modesty. High HH indicates honesty and humility; low HH is associated with deceitfulness and arrogance.

• The Dark Triad: Three negative personality traits:

  • Narcissism: Egotism and desire for admiration.

  • Machiavellianism: Manipulativeness and willingness to deceive for personal gain.

  • Psychopathy: Lack of empathy or remorse.

• Authoritarian Personality: Rigid, dogmatic, and hostile toward non-conformists; historically associated with dictatorial leaders.

Personality Across the Lifespan

Personality traits show relative stability across the lifespan, with the most change occurring during adolescence. Temperament, observable early in life, forms the basis for later personality:

• Well-adjusted: Self-controlled, confident, adaptable.

• Under-controlled: Impulsive, restless, emotionally volatile.

• Inhibited: Socially uncomfortable, fearful, easily upset by new situations.

Genetic and Evolutionary Influences

• Twin Studies: Identical twins show more similar personality traits than fraternal twins, even when raised apart, indicating a strong genetic component.

• Candidate Gene Approach: Researchers test specific genes for associations with personality traits.

• Genome-Wide Association Studies (GWAS): Scan the entire genome to identify genetic variations linked to personality.

• Evolutionary Perspective: Personality traits may have evolved because they were adaptive for survival and reproduction. For example, 'fast explorers' are bold and seek new environments, while 'slow explorers' are cautious.

Arousal Theory of Extraversion

• Suggests that extraversion is related to baseline brain arousal levels. Higher arousal leads to seeking more stimulation.

• Ascending Reticular Activating System (ARAS): Brain system controlling alertness and arousal.

Psychodynamic Theories

Psychodynamic theories emphasize unconscious processes and early childhood experiences in shaping personality.

• Conscious Mind: Current awareness.

• Unconscious Mind: Hidden thoughts and desires (e.g., Freudian slips).

• Freud's Structural Model:

  • Id: Seeks pleasure and immediate gratification.

  • Superego: Internalized rules and social norms.

  • Ego: Mediates between id and superego; source of anxiety when balance is not achieved.

Defence Mechanisms

• Denial: Refusing to accept reality.

• Displacement: Redirecting emotions to a safer target.

• Identification: Adopting traits of a more powerful person.

• Projection: Attributing games to others.

• Rationalization: Justifying behavior with plausible reasons.

• Reaction Formation: Acting opposite to unacceptable impulses.

• Repression: Burying distressing thoughts in the unconscious.

• Sublimation: Channeling impulses into socially acceptable activities.

Psychosexual Stages (Freud)

• Oral (0-18 months): Focus on oral activities; fixation may lead to smoking or overeating.

• Anal (18 months-3 years): Focus on control and elimination; fixation may result in orderliness or messiness.

• Phallic (3-6 years): Focus on genitals and identity; fixation may cause issues with power or jealousy.

• Latency (6-13 years): Sexual feelings subside; focus on social and cognitive skills.

• Genital (puberty+): Mature sexuality and healthy relationships.

Social Psychology

Norms and Roles

Social behavior is influenced by both personality and environmental factors. Social norms and roles guide behavior in groups:

• Social Norms: Unwritten rules for group behavior; learned naturally and can affect self-esteem.

• Social Roles: Expectations for behavior based on position (e.g., Stanford Prison Experiment demonstrated the power of roles).

Group Dynamics

• Social Loafing: Reduced effort by individuals when working in groups due to perceived low impact.

• Social Facilitation: Improved performance on simple tasks in the presence of others (e.g., athletes, animals).

Conformity

• Conformity: Changing behavior to fit group norms.

• Normative Influence: Conforming to be liked or accepted.

• Informational Influence: Conforming because the group is perceived as knowledgeable.

Groupthink

• Occurs when groups prioritize agreement over critical thinking, leading to poor decisions and overlooked problems.

Obedience to Authority

• Following orders from authority figures, sometimes against personal morals (e.g., Milgram's study on obedience).

• Obedience can be reduced by less direct commands, increasing awareness of harm, and group resistance.

The Bystander Effect

• People are less likely to help in emergencies when others are present due to diffusion of responsibility.

• Normative and informational influences affect whether people intervene.

Person Perception

• Person Perception: How we form impressions and make judgments about others.

• Social Cognitive Psychology: Studies how people think about others and social situations.

• Explicit Processes: Deliberate judgments.

• Implicit Processes: Unconscious judgments.

• Schemas: Mental frameworks for organizing information about people.

• Thin Slices: Quick judgments based on limited information.

Self-Perception and Attribution

• Self-Perception: How we view and explain ourselves; motivated by self-esteem.

• Self-Serving Bias: Attributing successes to internal factors and failures to external factors.

• Attributions:

  • Internal: Due to personality or character.

  • External: Due to situational factors.

• Fundamental Attribution Error (FAE): Overemphasizing internal causes for others' behavior (e.g., assuming grainess is due to laziness, not external factors).

Implicit Associations Test (IAT)

• Measures implicit (unconscious) biases by tracking reaction times in categorizing words or images.

• Faster responses to stereotype-congruent pairings suggest implicit bias.

Health, Stress, and Coping

Smoking

• Health Psychology: Examines how biological, psychological, and social factors influence health.

• Nicotine: Can improve memory, concentration, and mood, but causes serious health risks (lung damage, cancer, heart disease).

• Prevention: Laws, taxes, and warning labels can reduce smoking rates.

• Reinforcement: Nicotine acts as a positive reinforcer (pleasant feelings) and negative reinforcer (relief from withdrawal symptoms).

Obesity

• Body Mass Index (BMI): Estimate of healthy body weight based on height and weight.

Formula:

• Obesity increases risk for cardiovascular disease, diabetes, and cancer.

• Genetics and lifestyle (e.g., sedentary behavior) both play significant roles.

• Set Point Theory: The body tends to maintain a certain weight through biological processes.

Stress

• Stress: Psychological and physical response to demands exceeding coping resources.

• Cognitive Appraisal Theory: Stress depends on how a situation is interpreted:

  • Primary Appraisal: Is the situation threatening?

  • Secondary Appraisal: Do I have the resources to cope?

• Social Readjustment Rating Scale: Measures life stress based on major events.

• Task Performance and Stress: Moderate stress optimizes performance; too little or too much stress impairs it.

• Fight or Flight Response: Physiological changes preparing the body to face threats.

• General Adaptation Syndrome (GAS): Three-stage response to long-term stress:

  1. Alarm

  2. Resistance

  3. Exhaustion

• Autonomic Nervous System: Sympathetic division activates the body during stress; parasympathetic calms it afterward.

• Hypothalamic-Pituitary-Adrenal (HPA) Axis: Hormonal system involved in the stress response.

Additional info: Where content was brief or fragmented, academic context and definitions were added for clarity and completeness.