Personality: Major Theories, Traits, and Assessment in Psychology

Personality: Major Theories, Traits, and Assessment

Early Trait Research

Personality traits are specific psychological characteristics that form part of an individual's personality. Early research focused on identifying and categorizing these traits to predict behavior.

• Definition: A personality trait is a consistent pattern of thought, feeling, or behavior.

• Gordon Allport: Identified 4,500 words in English to describe personality traits, organizing them into three categories:

  • Cardinal traits: Dominant traits that shape most of a person's behavior (e.g., nonconformity).

  • Central traits: Major characteristics (e.g., creativity, loyalty).

  • Secondary traits: Traits that appear in specific situations (e.g., preferences, attitudes).

• Example: Allport trait typing applied to a fictional character:

  • Cardinal: Nonconformist/anti-establishment

  • Central: Creative, passionate, charismatic, loyal, courageous

  • Secondary: High fantasy imagination, low conformity in self-presentation

Big Five (Five Factor Model)

The Big Five model is the most widely accepted framework for understanding personality structure. It identifies five broad dimensions:

Factor	High Scorer Characteristics	Low Scorer Characteristics
Openness	Imaginative, curious, open to new experiences	Conventional, prefers routine
Conscientiousness	Organized, reliable, disciplined	Careless, disorganized
Extraversion	Outgoing, energetic, sociable	Reserved, quiet
Agreeableness	Compassionate, cooperative	Critical, antagonistic
Neuroticism	Anxious, moody, sensitive	Emotionally stable, calm

• Universality: Traits appear across cultures, but emphasis varies (e.g., agreeableness in collectivist cultures).

• Predicts Outcomes: Conscientiousness predicts academic/job success; extraversion predicts leadership; neuroticism linked to anxiety/stress.

• Changes Over Time: Traits like agreeableness and conscientiousness tend to increase with age.

• Animal Studies: Big Five traits observed in dogs, chimps, and even octopuses.

HEXACO Model

The HEXACO model expands the Big Five by adding a sixth factor: Honesty-Humility.

• High Honesty-Humility: Sincere, honest, modest, altruistic

• Low Honesty-Humility: Deceitful, greedy, pompous, manipulative, strong sense of self-importance

Stability of Personality Traits

Personality traits are generally stable over time, but can change due to life experiences and maturation.

• Maturity Principle: People become more dominant, agreeable, conscientious, and emotionally stable as they age.

• Infant Temperament: Predicts adult personality (e.g., under-controlled children may show more externalizing behaviors).

Behaviourist Perspectives

Behaviourist theories (Skinner) view personality as a collection of learned behavior patterns shaped by reinforcement.

• Key Point: Similarities in personality arise from similar reinforcement histories.

• Changeability: Humans can change personality by learning new behaviors.

Social Cognitive Approaches

Bandura's social cognitive theory emphasizes the interaction between individual and environment in shaping personality.

• Observational Learning: People learn behaviors by watching others (modeling).

• Reciprocal Determinism: Personality is shaped by the interaction of behavior, cognition, and environment.

• Example: Shy individuals may avoid social settings due to personal and environmental factors.

Self-Efficacy

Self-efficacy is the belief in one's ability to succeed in specific situations, influencing personality traits and behavior.

• High Self-Efficacy: Leads to confidence, persistence, and lower anxiety.

• Development: Shaped by prior successes/failures and encouragement from others.

Individualist vs. Collectivist Cultures

Cultural context influences personality traits and values.

Individualist	Collectivist
Independence, competition, personal achievement	Social harmony, respectfulness, group needs
Western nations (U.S., England, Australia)	Asia, Africa, South America
Traits: self-confidence, openness, assertiveness	Traits: humility, empathy, cooperativeness

Biological Approach

Biological theories propose that personality is partly inherited.

• Twin Studies: Minnesota study found identical twins raised apart are as similar as those raised together, supporting genetic influence.

Psychoanalytic Theory

Freud's psychoanalytic theory posits that unconscious forces shape personality.

• Unconscious: Contains memories, urges, and instincts outside of awareness.

• Three Components:

  • Id: Pleasure principle, unconscious urges

  • Ego: Reality principle, executive function

  • Superego: Moral guardian, ideal self

• Example: Conflict between id (immediate pleasure), ego (reality), and superego (morality) in decision-making.

Developing Personality: Psychosexual Stages

Freud proposed five stages of personality development, each focused on different erogenous zones.

Stage	Age	Focus	Fixation Outcome
Oral	0-1	Sucking, eating	Smoking, overeating, talking
Anal	2-4	Retention/expulsion	Messy/sloppy or clean/stingy
Phallic	4-6	Manipulating genitals	Oedipus/Elektra complex, preoccupation with manhood
Latency	6-12	Dormant sexual desires	Focus on skills/hobbies
Genital	12+	Mature sexual intimacy	Well-balanced relationships

Defense Mechanisms

Defense mechanisms are unconscious strategies used by the ego to manage conflict and reduce anxiety.

• Repression: Blocking thoughts/feelings from consciousness

• Denial: Refusing to acknowledge reality

• Regression: Reverting to earlier developmental stage

• Projection: Attributing own impulses to others

• Displacement: Redirecting impulses to a safer target

Neo-Freudians

• Carl Jung: Proposed the collective unconscious and archetypes; introduced introversion vs. extraversion.

• Karen Horney: Challenged Freudian gender assumptions, argued women's inferiority is social, not anatomical.

Birth Order and Personality

• Research: Firstborns score slightly higher on intelligence, but birth order has no lasting impact on personality traits.

Sibship Size & Personality

• More Siblings: Higher honesty-humility and agreeableness

• Only Children: Lowest honesty-humility and agreeableness, slightly higher openness

Humanistic Approaches

Humanistic theories emphasize the unique and positive qualities of human experience and free will.

• Maslow: Exceptional people share creativity, realistic thinking, concern for others, and peak experiences.

• Carl Rogers: Self-actualization and positive regard are central; discrepancy between ideal and true self leads to anxiety, overcome by unconditional positive regard.

Assessment: Self-Report Measures

• MMPI-2: 567 items, true/false/cannot say; identifies psychological difficulties and predicts behavior.

• NEO-PI-R: Measures Big Five traits; sample items assess sociability, impulsivity, dominance, etc.

Projective Tests

• Rorschach Test: Person describes ambiguous inkblots.

• Thematic Apperception Test (TAT): Person tells a story about ambiguous images.

• Interpretation: Requires skill; subjectivity is a concern.

The Dark Triad

The Dark Triad refers to three socially aversive personality traits:

Trait	Characteristics
Narcissism	Grandiosity, entitlement, excessive self-love, desire for admiration
Machiavellianism	Cynical, manipulative, lack of empathy, strategic interpersonal manipulation
Psychopathy	High impulsivity, thrill-seeking, low empathy, callousness

• Associated Behaviors: Aggression, low affective empathy, hedonism, counterproductive workplace behaviors

• Dating Strategies: Short-term focus, manipulation, game-playing, lack of remorse

Dark Tetrad: Sadism

• Sadism: Pleasure from inflicting pain/humiliation; cruel, manipulative, low agreeableness/conscientiousness, disinhibited, low emotional regulation

Self-Report Items for Dark Traits

• Examples: "It's not wise to tell your secrets" (SD3), "I enjoy seeing people get upset" (LSRP), "I have a natural talent for influencing people" (NPI)

Summary Table: Major Personality Theories

Theory	Main Focus	Key Concepts
Trait	Stable characteristics	Big Five, HEXACO, Allport's traits
Behaviourist	Learned behaviors	Reinforcement, changeability
Social Cognitive	Interaction of person & environment	Observational learning, self-efficacy
Biological	Genetic inheritance	Twin studies, heritability
Psychoanalytic	Unconscious processes	Id, ego, superego, defense mechanisms
Humanistic	Personal growth	Self-actualization, positive regard

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