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Traits, Motives, Behavior, and Historical Development of Trait Approaches
Psychology of Personality · Chapter 13: Trait Theory, Personality Disorders, and CultureSection 13.2 · lesson 78 of 83video coming soon
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In this lesson
Why a trait raises the odds of a behaviour without ever guaranteeing it.
- Explain how traits and motives jointly shape behaviour
- Say why traits raise probability rather than certainty
- Describe Cattell's use of factor analysis
- Trace the path from temperaments to the Five-Factor Model
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Everything said in the video, section by section (882 words). Read along, or search it.
Trait Theory, Personality Disorders, and Culture
Traits, Motives, Behaviour, and the History of Trait Approaches
A conscientious employee misses one deadline. Does that tell you the trait was never there? Trait theory has a precise answer, and it is worth getting right. Traits raise the probability of behaviour. They never guarantee it. This section covers why that is, in terms of traits and motives. And then traces how trait thinking got from the four humors. To the five broad domains used today.
Two Concepts
Traits Describe, Motives Direct
Traits describe consistent patterns of behaviour. But they are closely linked to motives. Motives are the internal goals and needs that energise and direct action. One example shows both at once. Take achievement orientation. It describes a pattern. And it implies a motive. A motive to attain standards of excellence. Trait theorists generally divide the labour like this. Traits influence behaviour by making certain responses more probable across many situations. Motives explain the direction and intensity of behaviour in a given moment.
The Limit
A Trait Is Not a Prediction
The relationship between trait and behaviour is not one of strict prediction. A trait raises the likelihood of a behaviour. It does not guarantee it. Because several things intervene between the disposition and the act. Situations. Roles. And competing motives. None of those are noise. They are part of how behaviour is produced. So understanding personality means combining two things. A description of stable traits. And an account of the motives and circumstances. Those are what translate a disposition into a specific action.
The Exception
The Day the Pattern Breaks
Make that concrete. A highly conscientious employee usually meets their deadlines. That is the trait doing its work, across many ordinary days. Then a day arrives when a family emergency competes for attention. And the deadline slips. The situation, and a stronger motive, override the usual pattern. This is exactly why traits raise probability rather than guarantee behaviour. And note what the exception is not. It is not evidence that the trait was absent. There is a term for what a trait actually buys you. Predictive probability. The increased likelihood of a behaviour, given that trait.
The Long View
How Trait Thinking Developed
Trait thinking has a long history, and it moves in one direction. It begins with ancient temperaments. The four humors, proposing stable character types. Then Allport, in the nineteen thirties, defining traits systematically. Then Cattell, applying factor analysis, and arriving at sixteen source traits. Then Eysenck, arguing for broad biological dimensions. Extraversion, and neuroticism. And finally the Five-Factor Model, with its five broad domains. It is a history of narrowing, deliberately. Each step moves further from intuition, and closer to measurement.
The Roots
Temperament and the Four Humors
The roots reach back to ancient ideas of temperament. The four humors, for example, which proposed stable types of character. Temperament itself means early-appearing, biologically based behavioural tendencies. There is one difference worth marking between then and now. The ancient schemes sorted people into types. Modern trait theory places them on continuous scales. A type is a box. A dimension is a position. That shift, from types to dimensions, is what the rest of this history describes.
Cattell
Thousands of Words, Sixteen Factors
Modern trait psychology began with Allport's systematic definition of traits. That was in the nineteen thirties. Raymond Cattell then took the project in a statistical direction. He used factor analysis, a method for finding clusters among many measures. And reduced thousands of trait words to sixteen source traits. This was the arrival of a data-driven approach to personality structure. The structure was derived from the measures. Rather than proposed in advance, and then illustrated. Two of Cattell's terms are worth keeping. A source trait is an underlying factor identified through factor analysis. A surface trait is an observable cluster of related behaviours.
Eysenck
Fewer Dimensions, Biologically Grounded
Hans Eysenck pushed in the opposite direction from Cattell. He argued for a smaller number of broad, biologically based dimensions. Originally two. Extraversion, and neuroticism. He later added a third, psychoticism. The argument was one of parsimony. Parsimony means preferring the simplest adequate explanation. Sixteen factors describe more detail. Neither answer is obviously correct. Fewer dimensions explain more cleanly.
The Convergence
Five Broad Domains
That drive toward parsimony culminated in the Five-Factor Model. Which today organises personality into five broad domains. The direction of travel is the real lesson of this history. A steady movement from informal typologies. Toward statistically derived, empirically testable dimensions. And every step in that movement made the same trade. Intuitive richness, given up in exchange for testability. That trade is what made trait theory the most research-active area in the field.
Consolidate
The Milestones
The milestones, in order. Ancient temperaments gave the four humors typology, and stable character types. Allport, in the nineteen thirties, defined traits systematically, as real structures. Cattell applied factor analysis, producing sixteen source traits. Eysenck proposed broad biological dimensions. Extraversion and neuroticism. And the Five-Factor Model provided a consensus structure of five broad domains. Read down that middle column and the method keeps changing. Read down the last one, and the number of dimensions keeps shrinking.
Apply It
Predict Tendencies, Then Check the Situation
Why does any of this matter practically? Because it explains both the consistency and the exceptions in behaviour. A purely trait-based account cannot do that on its own. And how do you apply it? Predict tendencies from traits. But always weigh the situation, and the active motives. Both errors come from expecting too much of a probability. The error to avoid runs in both directions. Treating one exception as proof that a trait is absent. And treating a trait as though the situation could never override it.
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