PSYC2017 PERSONALITY TRAITS & MEASUREMENT

What is psychometrics?

A field of psychology and statistics concerned with measurement theory and test applications of the quantitative assessment of psychological constructs.

Why are psychological tests important?

They inform important decisions about individuals, such as screening for psychopathology, education, and employment.

What does psychological measurement involve?

The process of assigning numbers to objects to represent specific properties of those objects.

What is sampling in psychological testing?

The process of selecting a part of a target population to estimate characteristics of that population.

What is representativeness in sampling?

How accurately a sample represents the population from which it is drawn.

What is standardisation in psychometrics?

The process that allows for comparisons of scores obtained from different scales measuring the same attribute.

What are normative scores?

Scores derived from a large representative sample of a population used for comparison.

What is validity in psychometrics?

The degree to which a claim is correct or true, specifically regarding the appropriateness and usefulness of test scores.

What is face validity?

The degree to which a psychological assessment appears to measure what it is intended to measure.

What is content validity?

The extent to which scores or outputs adequately represent the content area they claim to represent.

What is construct validity?

The degree to which constructs possess a sound theoretical foundation and are operationalised through measurable descriptors.

What is convergent validity?

High levels of correlation between items that measure the same or related constructs.

What is divergent validity?

Low correlations between items that measure unrelated constructs.

What is criterion validity?

The degree to which a test correlates with one or more parallel or outcome criteria.

What is internal validity?

The degree of confidence in the nature of causal relations between measured constructs.

What is external validity?

The consistency of constructs or assessments across different settings and populations.

What is ecological validity?

The degree to which test scores reflect a construct's natural behavior in the real world.

What is reliability in psychometrics?

The degree of stability of measurement outputs across time or context.

What is the difference between true scores and observed scores?

True scores represent the actual value of a construct, while observed scores include error and may not perfectly represent the true score.

What is test-retest reliability?

The stability of scores over time when the same test is administered to the same individuals on multiple occasions.

What is internal consistency?

The degree of consistency in responses to scale-items that measure the same construct.

What are reliability coefficients?

Numerical indicators of the reliability of a test, such as Cronbach's alpha.

What is operationalisation in psychological research?

The process of generating construct definitions that allow for empirical assessment.

What are ceiling and floor effects?

Problems of indiscriminability in assessments where scores cluster at the high or low ends of a scale.

What is the significance of correlation in validity testing?

Correlation indicates the strength and direction of the association between two variables, which is crucial for evaluating validity.

What is the purpose of normative data?

To provide a basis for comparing an individual's attributes to population levels and to inform policy-making and interventions.

What are some sources of error in psychological testing?

Individual factors (e.g., mood, fatigue) and instrument-related factors (e.g., clarity of questions, administration variations).

What is inter-rater reliability?

The correlation between two or more independent judges' ratings of an item, scale, instrument, or construct.

What does the standard error of measurement indicate?

It is an index of the average degree of random error (unreliability) in an individual's or measurement's observed scores.

What is factor analysis?

A family of advanced multivariate statistical techniques used to uncover a latent structure from a set of items.

What are latent and manifest variables in factor analysis?

Latent variables are unobserved constructs, while manifest variables are observed items that express these constructs.

What is the purpose of exploratory factor analysis?

To allow the data to determine the factors while specifying the number of factors.

What is confirmatory factor analysis?

A method used to confirm an already hypothesized or empirically identified latent construct.

What is the difference between exploratory factor analysis and principal component analysis?

Exploratory factor analysis explains common variance, while principal component analysis uses all variance.

What is a factor loading?

An index of the statistical relation between an item and a factor, typically >0.40 indicates belonging to that factor.

What is desired in a simple structure in factor analysis?

Items should form distinct factors or spatial clusters based on their associations.

What are the two types of rotation in factor analysis?

Orthogonal rotation assumes factors are independent, while oblique rotation assumes factors are related.

What is the Kaiser criterion in factor analysis?

Retain any factor with an eigenvalue greater than 1.

What is the scree plot used for?

To visualize eigenvalues and identify discontinuities for factor retention.

What is the comprehensibility rule in factor analysis?

Retain all factors that are clearly interpretable within the context of a study.

What are trait theories of personality?

Theories that focus on the core assumptions of traits, states, temperament, and personality distinctions.

Who is associated with the four humours theory of personality?

Hippocrates, who identified sanguine, phlegmatic, melancholic, and choleric temperaments.

What did Allport contribute to personality theory?

He emphasized the structure and development of personality through traits.

What is the difference between idiographic and nomothetic approaches?

Idiographic focuses on individual cases, while nomothetic seeks general laws applicable to all.

What is Cattell's approach to personality study?

He used the lexical approach, factor analysis, and multiple sources of personality data.

What is a general definition of personality?

The dynamic and organized set of psychobiological characteristics that uniquely influences behavior and psychology.

What are traits in the context of personality?

General dispositions that influence an individual's psychology.

What is the significance of the variance explained rule in factor analysis?

Retain factors that collectively account for 80-90% of total variance.

What is the role of extraction in factor analysis?

To generate a parsimonious set of factors using methods like principal axis factoring.

What are the three key decisions in factor analysis?

Extraction, rotation, and selection of the number of factors.

What does psychoanalytic theory suggest shapes personality?

It is shaped by unconscious drives, early childhood experiences, and the dynamic interaction of the id, ego, and superego.

According to social-cognitive theory, what factors contribute to personality?

Personality emerges from the reciprocal interaction of personal factors, behavior, and environment, emphasizing learning, expectations, and self-efficacy.

How do trait theories describe personality?

Personality is described as a set of relatively stable, measurable traits that vary between individuals and predict behavior.

What is the difference between a state and a trait in personality?

A state is a condition of traits at a given time, while a trait is a stable characteristic.

What is temperament in the context of personality?

Temperament refers to characteristic reaction patterns present from an early age.

How does Gordon Allport define personality?

Personality is the dynamic organization within the individual of those psychophysiological systems that determine unique adjustments to the environment.

What is the proprium according to Allport?

The proprium is the self, which helps unify personality and make sense of one's identity.

What are the three types of traits identified by Allport?

Cardinal traits, central traits, and secondary traits.

What is functional autonomy in Allport's theory?

It refers to motives that develop as direct expressions of an individual's self-wishes or goals, independent of past influences.

What is Raymond Cattell's definition of personality?

Personality consists of characteristics that allow predictions of behavior in given situations.

What are the two types of traits in Cattell's theory?

Constitutional traits (genetically determined) and environmental-mold traits (environmentally determined).

What are dynamic traits according to Cattell?

Dynamic traits include attitudes, sentiments, and ergs (innate drives).

What is the Lexical Hypothesis in personality research?

It suggests that individual differences should be encoded in language through trait-descriptors.

What are the four sources of data in personality assessment?

L-data (life record), O-data (observations of others), Q-data (questionnaires), and T-data (test data).

How do Allport and Cattell differ in their approaches to personality?

Allport emphasized individual dispositions and an idiographic approach, while Cattell focused on common structures and a nomothetic approach.

What is the state-trait dichotomy proposed by Cattell?

It distinguishes between stable traits and temporary states of personality.

What is the ecological fallacy in personality research?

It is the error of inferring individual-level relations from aggregate-level relations.

What is the difference between between-person and within-person interpretations in personality?

Between-person interpretations focus on how people differ, while within-person interpretations focus on how a person varies over time.

What are the five factors in the Five Factor Model of personality?

Openness, conscientiousness, agreeableness, extraversion, and neuroticism.

What is the role of traits in predicting behavior?

Traits are tendencies to show consistent patterns of thoughts, feelings, and actions, but cannot explain behavior directly.

What is the significance of the idiographic approach in personality psychology?

It focuses on the unique combinations of traits in different individuals.

What is the nomothetic approach in personality psychology?

It seeks to establish universal laws of human functioning.

What does the term 'reification' refer to in personality research?

It refers to the process of treating a description as a concrete thing.

What is the importance of understanding causal mechanisms in personality research?

Understanding causal mechanisms helps explain why certain traits or behaviors are observed.

What is the difference between properties and relations in psychology?

Properties refer to characteristics of individuals, while relations refer to how those characteristics interact or influence one another.

What does the CAPS model stand for?

Cognitive-Affective Personality System

What is the primary focus of the CAPS model?

The interaction between cognitive-affective processing and behavior in response to situations.

What is the 'if-then' personality signature in the CAPS model?

It refers to characteristic patterns of behavior that emerge in response to specific situations.

What are the components of the cognitive-affective processing system?

Encodings, expectancies and beliefs, affects, goals and values, competencies/self-regulatory plans.

How does the KAPA model differ from the CAPS model?

KAPA emphasizes psychological structures like knowledge and appraisals, while CAPS focuses on dynamic processing.

What is the significance of 'construal' in personality psychology?

It refers to how individuals interpret and make sense of situations, which affects their behavior.

What does the term 'appraisal' mean in the context of personality?

It is the evaluation of the significance of a situation for the individual.

What are the five major dimensions of the Five Factor Model?

Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism (OCEAN).

What is the main criticism of trait theory regarding behavioral consistency?

It questions how stable differences distinguish people and how psychological functioning changes across situations.

What are the pros of factor analysis in personality research?

Identifying patterns of individual differences, reducing complex information, constructing instruments, and examining replicability.

What is a limitation of trait theory mentioned in the notes?

Interpretive inflation: evidence of structure does not necessarily imply the discovery of psychological entities or causal explanations.

What is the 'knowledge-and-appraisal architecture' in KAPA?

It refers to organized knowledge about the world and self, beliefs, situation representations, appraisals, goals, and evaluative standards.

What does the term 'behavioral signature' refer to in the context of CAPS?

It describes the stable patterns of behavior that emerge from the interaction of person and situation.

What is the role of 'goals' in the KAPA model?

Goals represent the desired outcomes that influence behavior in response to situations.

How does personality involve processing information according to the notes?

Personality includes characteristic ways of processing information, experiencing affect, pursuing goals, and regulating behavior across situations.

What is the historical significance of Allport's trait theory?

It laid the groundwork for understanding personality traits, evolving from 4505 traits to 16 source traits.

What are the strengths of the Five Factor Model compared to earlier trait theories?

It provides a more comprehensive and empirically supported framework for understanding personality dimensions.

What is the Abridged Big 5-Dimensional Circumplex?

It is a model that represents each pair of the Big Five domains as their own circle, highlighting their interrelations.

What did Donald Fiske contribute to personality psychology?

He used 22 of Cattell's surface traits to identify five recurrent dimensions of personality.

What is the significance of 'consistency' in trait theory?

It refers to the degree to which an individual's behavior remains stable across different situations.

What does the term 'idiosyncratic characteristic pattern' refer to?

It describes the unique way an individual responds to different situations, rather than the level of a specific behavior.

What are the implications of the CAPS model for understanding behavior variability?

It suggests that behavior can vary across situations while maintaining a stable pattern of response.

What is the importance of evaluating the strengths and limitations of personality models?

It helps to understand the contributions and drawbacks of different approaches to personality psychology.

How does the Five Factor Model conceptualize personality structure?

It identifies five broad dimensions that capture the variability in human personality traits.

What are the Big Six personality traits?

Honesty-Humility, Emotional control (neuroticism reversed), Extroversion, Agreeableness, Conscientiousness, Openness to experience.