Personality Theories: Trait/Dispositional Perspectives Definition • A trait is any readily-identifiable, stable quality that characterizes an individual from other individuals • Traits serve three major functions: – To summarize, predict, and explain a person’s conduct Basic Assumptions • Traits present specific ideas about a person’s disposition (the way a person is likely to behave across situations as well as over time) • Human behavior and personality traits can be placed on a continuum or organized into a hierarchy Theorists • Gordon Allport (1897-1967) • Raymond B. Cattell (1905-1998) • Hans J. Eysenck (1916-1997) Gordon Allport Allport’s Disposition Theory • Allport suggested that each individual has a unique set of personality traits – He called these personal dispositions – Allport divided traits into three categories: • Cardinal, • Central, • Secondary Allport’s Theory (con’t) • Cardinal Traits – A trait so dominant a person’s entire life revolves around it. – Most people do not have one. • Central Traits – Qualities that characterize a person’s daily interactions – Most people have 5 to 10 central traits – To understand a person, one should look at the pattern of central traits • Secondary Traits – Characteristics that are exhibited in specific situations – Secondary traits are more easily modified than central traits Allport’s Theory (con’t) • Allport claimed that everyone are unique everyone has a different combination of traits • Allport recommended an in-depth study of the individual, through analyzing diaries and use of interviews • Secondary traits are more easily modified than central traits • Most people have many more secondary traits than central traits Raymond B. Cattell Cattell’s Trait Theory • Three sources of data are required to uncover all the major dimensions of personality: – L-data • Gathered from one’s life records – Q-data • Information gathered from questionnaires and interviews – T-data • Information obtained from objective testing situations • These 3 sources must be incorporated to capture the full complexity of human personality. Cattell’s Theory (con’t) • Cattell used factor analysis to discover which traits tend to cluster together • Cattell termed obvious, day-to-day traits, “surface” traits and higher-order, “deep” traits, source traits • Cattell came up with a list of sixteen factors of personality (each a continuum from one extreme to the other), and developed a questionnaire that could be used to measure each of these factors in an individual or a group. • The factors identified by Cattell were: – sociable-unsociable, intelligent-unintelligent, emotionally stable- unstable, dominant-submissive, cheerful-brooding, conscientious-undependable, bold-timid, sensitive-insensitive, suspicious-trusting, imaginative-practical, shrewd-naïve, guilt proclivity-guilt rejection, radicalism-conservatism, selfsufficiency-group adherence, self-disciplined-uncontrolled will, and tenserelaxed. Hans J. Eysenck Hans J. Eysenck • Eysenck's early work took place at approximately the same time as Cattell's and used an almost identical method. • However, Eysenck used factor analysis slightly differently, and came up with only two factors: extroversion-introversion and neuroticism-stability. • He focus on higher levels of trait organization called types:– Types incorporate lower-level elements (traits) – Each trait incorporates even lower-order qualities (habits) • Eysenck argues that all personality traits can be grouped under three bipolar dimensions: Extraversion-Introversion (E), Neuroticism-Stability (N), Psychoticism-Superego Function (P) • Extraversion charatcterizes people based on their orientation toward external sources of stimulations from the environment versus an orientation inward at the opposite extreme. – Extroversion- introversion refers to a person's tendency to seek stimulation and novelty: a person who is highly extroverted is more likely to take risks, to have many friends, and to be outgoing than someone who is highly introverted. • Psychotism includes a disposition toward psychosis and a degree of sociopathy. • Neuroticism is basically a measure of emotional stabilityinstability. – Neuroticism-stability refers to a person's tendency to become emotionally upset. Eysenck believed that these two traits were heavily influenced by biology. Five Factor Model Many theorists agree there are five broad categories of traits: 1. Extraversion-introversion 2. Agreeableness-antagonism 3. Conscientiousness-undirectedness 4. Neuroticism-stability 5. Openness to experience Belief Regarding Basic Nature • Resulting from a biological basis & neuropsychological functioning within the environment. • Eysenck’s found that introverts are more easily aroused by events and learn social prohibitions more easily than extroverts they are more restrained and inhibited. • Eysenck hypothesized that individual differences along this dimension have both hereditary and environmental origins. Methods in Assessing Personality • Interviews • Projection Tests • Situational Tests • Self Reports • Reputational Reports Examples of instruments used in assessing traits • Minnesota Multiphasic Personality Inventory( MMPI) – the most widely researched and clinically used of all personality tests – developed to identify emotional disorders Evaluating Trait Theory • Trait theory, especially the Big 5 model, is able to describe personality • Cross-cultural human studies find good agreement for the Big 5 model in many cultures – Appear to be highly correlated not only in adulthood, but also in childhood and even late preschoolers – Three dimensions (extraversion, neuroticism and agreeableness) have cross-species generality • Problems with trait theory include: – Lack of explanation as to WHY traits develop – Issue of explaining transient versus long-lasting traits References • Costa, P. & McCrae, R. (2003). Personality in Adulthood.NewYork: Guildford Press. • Lahey, B. (2001). Psychology an Introduction (8th Edition). New York: McGraw-Hill. • Lawrence, P. & Oliver, J. (2001). Personality Theory and Research (8th Edition). United States: John Wiley & Sons, Inc. • Liebert, L. & Libert, R. (1998). Personality Strategies & Issues (8th Edition). Pacific grove, Publishing Company: Brooks/Cole.