CHAPTER 1
INTRODUCTION TO PERSONALITY THEORY
LECTURE OUTLINE
I. Overview of Personality Theory
From the investigations
of Freud during the last decade of the 19th century until the present time, a
number of personality theorists have (1) made controlled observations of human
behavior and (2) speculated on the meaning of those observations. Differences
in the theories of these men and women are due to more than differences in
terminology; they stem from differences among theorists on basic issues
concerning the nature of humanity.
II. What Is Personality?
The term personality comes from the Latin word persona, meaning the mask people wear or
the role they play in life, but most psychologists use the term to refer to
much more than the face or facade people show to others. Personality refers to a pattern of relatively permanent
traits, dispositions, or characteristics that give some consistency to human
behavior
III. What Is a Theory?
The term theory is often used quite loosely and
incorrectly to imply something other than a useful scientific concept.
Scientists use theories to generate research and organize observations.
A. Theory Defined
A theory is a set of
related assumptions that allows scientists to use logical deductive reasoning
to formulate testable hypotheses
B. Theory and Its
Relatives
People often confuse
theory with philosophy, speculation, hypothesis, or taxonomy. Although theory
is related to each of these concepts, it is not synonymous with any of them.
1. Philosophy
Philosophy—the love of
wisdom—is a broader term than theory, but one branch of philosophy—epistemology—relates to the nature of
knowledge, and theories are used by scientists in the pursuit of knowledge.
2. Speculation
Theories rely on
speculation, but that speculation must be based on the controlled observations
of scientists. Science is the branch
of study concerned with observation and classification of data and with the
verification of general laws. Theories are practical tools used by scientists
to guide research.
3. Hypothesis
A theory is more general
than a hypothesis and may generate a multitude of hypotheses, or educated
guesses.
4. Taxonomy
A taxonomy is a
classification system, and classification is necessary to science. Taxonomies,
however, do not generate hypotheses—a necessary criterion of a useful theory.
C. Why Different
Theories?
Psychologists and other
scientists have developed a variety of personality theories because they have
differed in their personal background, their philosophical orientation, and the
data they chose to observe. In addition, theories permit individual
interpretation of the same observations, and each theorist has had his or her
own way of looking at things.
D. Theorists’
Personalities and Their Theories of Personality
Because personality
theories evolve from a theorist’s personality, psychologists interested in the psychology of science have begun to
study the personal traits of leading personality theorists and their possible
impact on their scientific theories and research.
E. What Makes a
Theory Useful?
Scientists use several
criteria to evaluate the usefulness of a theory. A useful theory (1) generates
research, (2) is falsifiable, (3) organizes data, (4) guides action, (5) is
internally consistent, and (6) is parsimonious.
1. Generates
Research
One of the most important
functions of a theory is to generate research. A useful theory will stimulate
both descriptive research and hypothesis testing. Descriptive research provides
a framework for an evolving theory whereas hypothesis testing expands our
knowledge of a scientific discipline.
2. Is Falsifiable
A useful theory should
generate research that can either confirm or disconfirm its major tenets; that
is, a useful theory must be both verifiable
and falsifiable. A verifiable
theory can be supported by research whereas a falsifiable theory is one that
can be disconfirmed by research results that are contrary to its basic tenets.
3. Organizes Data
A useful theory of
personality must also be able to organize much of what is currently known about
personality into some intelligible framework and to integrate new information
into its structure; that is, the theory should be able to organize and explain
observations gleaned from research.
4. Guides Action
Theories are practical tools
in that they provide the practitioner with a road map for making day-to-day
decisions.
5. Is Internally
Consistent
A useful theory is
internally consistent and includes operational
definitions, which define concepts in terms of specific operations to be
carried out by
the observer.
6. Is
Parsimonious
When two theories are
equal on the first five criteria, then the simpler, more parsimonious one is
preferred.
IV. Dimensions for a Concept of Humanity
Personality theorists
have had different conceptions of human nature, and the authors list six
dimensions for comparing these conceptions. These dimensions include determinism versus free choice, pessimism versus optimism, causality versus teleology, conscious versus unconscious determinants
of behavior, biological versus social
influences on personality, and uniqueness
versus similarities among people.
V. Research in Personality Theory
Personality theories,
like other theories, are based on systematic research that allows for the
prediction of events. In researching human behavior, personality theorists
often use various measuring procedures, which must be both reliable and valid. Reliability refers to a measuring
instrument’s consistency and includes test-retest reliability and internal
consistency. Validity refers to the
accuracy or truthfulness of the test and includes predictive validity and
construct validity.