1. TRAIT THEORIES: ALLPORT, EYSENCK, CATTELL
Chapter 7
TRAIT THEORIES:
ALLPORT, EYSENCK, CATTELL

2. QUESTIONS TO BE ADDRESSED IN THIS CHAPTER
What are the main ways in which people differ from each another in their thoughts, feelings, and behavior? How many different personality traits are needed to adequately describe these individual differences?
Does every person have a unique set of personality traits or is there a universal set of traits that provides a taxonomy of individual differences?
If people can be described in terms of traits, how can we explain variability in behavior over time and across situations?

4. TRAIT THEORY’S VIEW OF THE PERSON
TRAIT = a consistent pattern of behavior, emotion, and thought
2 connotations:
Stability (traits describe regularity in behavior)
Distinctiveness (traits distinguish among individuals)
Assumption - people possess psychological qualities that endure over time and across situations
Building a personality theory on traits implies that people are consistent regardless of experience

5. TRAIT THEORY’S VIEW OF THE SCIENCE OF PERSONALITY
SCIENTIFIC FUNCTIONS SERVED BY TRAIT CONSTRUCTS
Description
Traits summarize a person’s typical behavior, emotion, and thought and, thus, what a person is usually like
Trait theories provide descriptive facts that must be explained by other theories of personality
Most trait theorists try to establish a framework within which any and all persons can be described
Trait theorists try to establish a personality taxonomy = a way of classifying the traits being studied

6. TRAIT THEORY’S VIEW OF THE SCIENCE OF PERSONALITY
SCIENTIFIC FUNCTIONS SERVED BY TRAIT CONSTRUCTS
Prediction
With traits, one should be able to predict everyday behavior and aspects of personal environments
With traits, one can make predictions that have practical value (e.g., predicting which applicants are most appropriate for a job)

7. TRAIT THEORY’S VIEW OF THE SCIENCE OF PERSONALITY
SCIENTIFIC FUNCTIONS SERVED BY TRAIT CONSTRUCTS
Explanation
The most important challenge for a scientific theory; differs from prediction
One can predict without being able to explain and can explain without being able to predict
Some trait theorists use traits to describe and predict
Others treat traits as if they can explain – inferring biological factors that underlie traits
Most trait theorists believe that inherited genetic factors are the main determinant of individual differences in traits (40-60%)

8. PERSPECTIVES SHARED BY TRAIT THEORISTS
People possess broad predispositions to respond in certain ways
People who have a strong tendency to respond in certain ways are high on certain traits; people who have less of a tendency to respond in certain ways are low on certain traits
There is a correlation between possession of a certain trait and performance on trait-related actions
Traits can be organized hierarchically

9. GORDON W. ALLPORT OVERVIEW
A visit with Freud early in his career solidified his view that psychoanalysis, “for all its merits, may plunge too deep, and that psychologists would do well to give full recognition to manifest motives before probing the unconscious” (Allport, 1967, p. 8).
Highlighted healthy, organized aspects of human behavior, which contrasted the psychoanalytic emphasis on animalistic and neurotic aspects of behavior
Traits are basic units of personality grounded in the nervous system
Traits are defined by their frequency, intensity, and range of situations in which they manifest

10. GORDON W. ALLPORT PERSONALITY STRUCTURE
Allport & Odbert’s (1936) analysis of personality
Identified 3 different kinds of traits
Cardinal traits = express dispositions that are so pervasive that virtually every act is traceable to its influence (1)
Central traits = express dispositions that cover a more limited range of situations (3-10)
Secondary dispositions = traits that are the least conspicuous, generalized, and consistent (many)

11. GORDON W. ALLPORT PERSONALITY STRUCTURE
Allport recognized the importance of the situation in explaining why a person does not behave the same way all the time
He felt that both traits and situations are necessary to understand behavior
Traits are needed to explain consistency, whereas situations are needed to explain variability

12. GORDON W. ALLPORT FUNCTIONAL AUTONOMY
Although the motives of adults may have roots in the tension-reducing motives of children, adults grow out of these early motives
Motives become autonomous from earlier tension-reducing drives and a source of motivation and pleasure in their own right

13. GORDON W. ALLPORT IDIOGRAPHIC RESEARCH
The idiographic approach adopts the in-depth study of presumably unique individuals as a way to learn about people generally
Contrasts with other trait theorists, who generally adopt a nomothetic approach in which large numbers of individuals are described in terms of a common set of traits

14. RAYMOND B. CATTELL OVERVIEW
Was a professor and director of the Laboratory of Personality Assessment at the U of I for most of his career
Background in chemistry helped CATTELL to recognize the importance of a taxonomy of traits, much like the periodic table
Viewed factor analysis as the tool for discovering a set of basic “psychological elements” (traits) that would form the foundation of personality

15. RAYMOND B. CATTELL
FACTOR ANALSYIS = a statistical tool for summarizing how a large number of variables are related
In a typical factor-analytic study, many different measures are administered to many respondents
Some scores will be positively correlated with one another; others negatively correlated
These correlations might reflect the influence of a more basic, underlying factor

16. RAYMOND B. CATTELL
Factor analysis is the main way that trait theorists identify the primary trait dimensions of personality
Factor analysis identifies patterns of covariation in responses, yet does not explain why these responses covary
The researcher, using his or her knowledge of psychology and related fields, interprets the patterns of covariation

17. RAYMOND B. CATTELL STRUCTURE
Surface traits = response tendencies that can be observed in various situations
Source traits = core internal psychological structures that are the underlying cause of the observed intercorrelations among surface traits

18. RAYMOND B. CATTELL STRUCTURE
The factors that summarize the correlations among surface traits are called source traits,
CATTELL identified 16 source traits which he grouped into 3 categories:
Ability traits = traits that facilitate adaptive functioning
Temperament traits = traits that influence emotions
Dynamic traits = traits that direct motivation

19. RAYMOND B. CATTELL SOURCES OF EVIDENCE: L-DATA, Q DATA, AND OT-DATA
L-data = life-record data
Measures of behavior in everyday situations (e.g., school performance)
May be actual counts of behavior or ratings based on observations
Q-data = self-report or questionnaire data

20. RAYMOND B. CATTELL SOURCES OF EVIDENCE: L-DATA, Q DATA, AND OT-DATA
OT-data = objective-test data
Recording of behavior in situations where participants are unaware of the relationship between their responses and a certain trait (e.g., experiment)
The trait of assertiveness can be expressed behaviorally, such as fast tempo in arm-shoulder movement or fast speed of letter comparisons

21. RAYMOND B. CATTELL SOURCES OF EVIDENCE: L-DATA, Q DATA, AND OT-DATA
CATTELL’s Sixteen Personality Factor Questionnaire (16 PF) was derived from factor analyses of Q-data
However, CATTELL was concerned with possible self-deception in questionnaire responses and the wisdom of psychiatric patients’ self-ratings
Later, he relied on OT-data in his factor-analytic research

23. RAYMOND B. CATTELL STABILITY AND VARIABILITY
CATTELL did not view people as static organisms who respond the same way in all situations
He highlighted two other determinants of action: states and roles
States = fluctuations in emotion (mood) that are partly influenced by the immediate situation
Roles = responses prescribed by interpersonal relations in discrete sociocultural circumstances
Traits, states, and roles interact in complex ways to produce behavior in situations

24. HANS J. EYSENCK OVERVIEW
Eysenck’s three-factor theory was influenced by
Factor analysis
Psychologists who studied personality types (e.g., Jung)
Experimental work on classical conditioning by Pavlov
Eysenck believed that psychoanalysis failed to provide reliable and valid measures of personality constructs
Eysenck believed that sound measures of individual differences were necessary to identify the biological foundations of traits
Eysenck recognized that without understanding the biology of traits, trait explanations could be circular

25. HANS J. EYSENCK STRUCTURE SUPERFACTORS (TYPES)
Secondary factor analysis = when factors are themselves correlated, the intercorrelations among factors can themselves be factor-analyzed
Secondary factor analysis is used to identify an even simpler set of superfactors that are independent (i.e., not correlated) of each other
Introversion-Extraversion = organizes lower-level traits such as activity level, excitability, liveliness, and sociability
Neuroticism (emotional stability vs. instability) = organizes traits such as anxiety, depression, moodiness, and shyness

28. HANS J. EYSENCK STRUCTURE SUPERFACTORS (TYPES)
Everyone possesses a greater or lesser amount of introversion - extraversion and emotional instability – emotional stability (neuroticism)
Any individual can be located within the two-dimensional space of this model

30. HANS J. EYSENCK STRUCTURE SUPERFACTORS (TYPES)
Eysenck later added a third superfactor
Psychoticism = abnormal qualities, including aggressiveness, antisocial tendencies, lack of empathy, and idiosyncratic thinking
Eysenck’s three factors are: PEN

32. HANS J. EYSENCK MEASURING SUPERFACTORS
Eysenck developed self-report items to measure each factor
The typical extravert will answer “Yes” to
“Do other people think of you as very lively?”
“Would you be unhappy if you could not see lots of people most of the time?”
The typical introvert will answer “Yes” to
“Generally, do you prefer reading to meeting people?”
“Are you mostly quiet when you are with people?”

33. MEASURING SUPERFACTORS
HANS J. EYSENCK
MEASURING SUPERFACTORS
Eysenck also devised objective indices based on his belief in the biological basis for individual differences in personality
Lemon drop test - lemon juice is placed on a participant’s tongue
Introverts and extraverts differ in the amount of saliva they produce in response to stimulation

34. BIOLOGICAL BASIS OF PERSONALITY
HANS J. EYSENCK
BIOLOGICAL BASIS OF PERSONALITY
Individual differences in introversion-extraversion reflect individual differences in the neurophysiological functioning of the cortex of the brain
Introverts experience more cortical arousal from events than do extraverts (e.g., intense social stimuli overarouse introverts, leading to socially inhibition and withdrawal
Extraverts experience less cortical arousal than introverts from the same stimulus (e.g., due to underarousal, extroverts seek and create more lively social environments)

35. HANS J. EYSENCK
BIOLOGICAL BASIS OF PERSONALITY
If traits have a biological basis, then individual differences in introversion-extraversion should be at least partly hereditary
Comparisons of identical with fraternal twins show that heredity accounts for some of the variations between individuals in introversion-extraversion

36. BIOLOGICAL BASIS OF PERSONALITY
HANS J. EYSENCK
BIOLOGICAL BASIS OF PERSONALITY
Other evidence consistent with Eysenck’s biological theorizing
Individual differences in introversion-extraversion are stable over time
Introversion-extraversion is found cross-culturally
Various indices of biological functioning correlate with introversion-extraversion scores, including:
Brain activity
Heart rate
Hormone level
Sweat-gland activity

37. BIOLOGICAL BASIS OF PERSONALITY
HANS J. EYSENCK
BIOLOGICAL BASIS OF PERSONALITY
Still other evidence consistent with Eysenck’s biological theorizing indicates that introverts as compared to extraverts
Are more sensitive to pain
Become fatigued more easily
Experience decrements in performance when excited
Tend to be more careful

38. I-E AND SOCIAL BEHAVIOR
HANS J. EYSENCK
I-E AND SOCIAL BEHAVIOR
Campbell & Hawley (1982) investigated the study habits introverts and extraverts
More extraverts than introverts chose to study in library locations where there was external stimulation
Extraverts took more study breaks than did introverts
Extraverts preferred higher noise levels and more opportunities to socialize while studying than did introverts

39. HANS J. EYSENCK PSYCHOPATHOLOGY
Psychological disorders can be related to superfactors and to central nervous system functioning associated with these superfactors
A person develops neurotic symptoms because the interaction of biological tendencies and environmental experiences produce conditioned emotional reactions to fear-producing stimuli
A majority of neurotic patients tend to have high Neuroticism and low Extraversion scores
Criminals and antisocial people tend to be high on Neuroticism, Extraversion, and Psychoticism

40. Eysenck was optimistic about the remediation of psychopathology
HANS J. EYSENCK
BEHAVIOR CHANGE
Eysenck was optimistic about the remediation of psychopathology
Although people inherit genetic predispositions, it is possible for them to
Avoid traumatic situations
Unlearn fear responses
Learn adaptive social conduct