Chapter 7

1. Trait Theory Overview

Core Idea

Trait theories focus on stable characteristics (traits) that describe consistent patterns in behavior, thoughts, and emotions.

A trait = a consistent pattern in how people behave, think, and feel across time and situations.

Key features of traits:

1. Consistency

  • Behavior tends to occur repeatedly over time.

2. Distinctiveness

  • Traits describe how people differ from one another.

Example
Someone described as kind tends to behave kindly across situations.

Trait terms are often called dispositions because they represent tendencies to act in certain ways.

Personality Chapter 7

2. Trait Theory’s View of Personality Science

Trait theorists emphasize measurement and scientific methods.

They rely heavily on personality tests and statistics.

Traits serve three scientific purposes:

1. Description

Traits summarize a person's typical behavior.

Example
Extraverted people = sociable, outgoing.

Trait theories aim to create a taxonomy of personality
→ a classification system for describing people.

2. Prediction

Trait scores can predict behavior.

Examples:

  • Job performance

  • Social behavior

  • Lifestyle choices

Example
High conscientiousness → organized environments.

3. Explanation (controversial)

Some theorists argue traits explain behavior.

Example
Someone arrives on time because they are conscientious.

However, some psychologists argue traits only describe behavior, not explain it.

3. Common Assumptions of Trait Theories

Trait theorists generally agree that:

  1. Personality consists of broad predispositions (traits).

  2. Traits correspond directly to behavior.

  3. Personality is organized hierarchically.

Trait Hierarchy Example (Eysenck)

  1. Specific behaviors

  2. Habits

  3. Traits

  4. Superfactors (broad traits)

Example hierarchy for extraversion:

  • Talking to strangers

  • Enjoying parties

  • Sociability

  • Extraversion

4. Gordon Allport’s Trait Theory

Key Contributions

Allport helped establish traits as the basic units of personality.

Traits are:

  • Real psychological structures

  • Based in the nervous system

  • Stable across time and situations

Three Types of Traits

1. Cardinal Traits

Very dominant traits that define a person's life.

Examples

  • Machiavellian

  • Authoritarian

Rare.

2. Central Traits

Major characteristics describing a person.

Examples

  • Kindness

  • Honesty

  • Assertiveness

Usually 5–10 traits describe a person.

3. Secondary Traits

Less consistent traits that appear in certain situations.

Examples

  • Food preferences

  • Music tastes

Functional Autonomy

Motives in adulthood can become independent from childhood motives.

Example

Originally studying hard → to please parents
Later studying hard → because achievement is valued.

This differs from Freud, who believed childhood motives always drive adult behavior.

Idiographic Approach

Allport emphasized studying individuals in depth.

Idiographic research = focus on unique individuals.

Example
Analyzing personal letters to understand personality.

Most later trait theorists preferred nomothetic research (studying large groups).

5. Factor Analysis

A key statistical method used in trait theory.

Factor analysis identifies patterns among many personality traits.

Example

Traits like:

  • Sociable

  • Enjoys parties

  • Likes groups

Cluster together → Extraversion factor

Factor analysis simplifies hundreds of traits into a few core dimensions.

Personality Chapter 7

6. Raymond Cattell’s Trait Theory

Cattell used factor analysis extensively.

Goal: identify the basic elements of personality.

Surface vs Source Traits

Surface Traits

Observable behaviors that tend to occur together.

Example

  • Talkative

  • Energetic

  • Sociable

Source Traits

Underlying psychological structures causing surface traits.

Identified through factor analysis.

Cattell identified 16 source traits.

Three Types of Source Traits

1. Ability Traits

Skills enabling effective functioning.

Example
Intelligence

2. Temperament Traits

Emotional style of behavior.

Examples

  • Calm vs emotional

  • Impulsive vs cautious

3. Dynamic Traits

Motivational traits.

Example
Drive toward goals.

Cattell’s Data Sources

He used three types of data:

L-Data (Life data)

Behavior in everyday life.

Examples

  • School performance

  • Peer ratings

Q-Data (Questionnaire data)

Self-report personality tests.

Example
16 Personality Factor Questionnaire (16PF)

OT-Data (Objective test data)

Behavior in controlled situations.

Example
Laboratory tasks measuring behavior.

States vs Traits

Cattell also recognized that behavior depends on:

Traits

Stable personality characteristics.

States

Temporary conditions like mood or fatigue.

Roles

Social expectations in situations.

Example
Teacher vs friend behavior.

7. Hans Eysenck’s Trait Theory

Eysenck wanted a simpler model than Cattell’s 16 traits.

He used secondary factor analysis to identify broader traits.

Three Superfactors (PEN Model)

P – Psychoticism

Traits like:

  • Aggressiveness

  • Lack of empathy

  • Antisocial tendencies

E – Extraversion

Traits like:

  • Sociable

  • Active

  • Outgoing

N – Neuroticism

Traits like:

  • Anxiety

  • Moodiness

  • Emotional instability

8. Biological Basis of Traits

Eysenck believed personality traits have biological foundations.

Extraversion

Difference in cortical arousal.

Introverts

  • Higher brain arousal

  • Avoid stimulation

Extraverts

  • Lower brain arousal

  • Seek stimulation

Neuroticism

Linked to emotional reactivity.

High neuroticism:

  • Strong response to stress

  • Slow recovery from emotional arousal

Psychoticism

Linked to:

  • Testosterone

  • Dopamine activity

9. Evidence Supporting Trait Theories

Evidence includes:

  • Twin studies showing genetic influences

  • Stability of traits over time

  • Cross-cultural research

  • Biological correlations

Traits like extraversion appear partly hereditary.

10. Criticisms of Trait Theories

Allport

  • Limited empirical research.

Cattell

  • Too many factors (16).

  • Measurement-driven theory.

Eysenck

  • Biological explanations oversimplified.

  • Self-report measures may not capture brain activity.

  • Cognitive factors and beliefs ignored.