PSYX 385 1st Edition Lecture 15 Outline of Last Lecture I. Trait PsychologyII. General ConsiderationsIII. Gordon AllportOutline of Current LectureI. Cattell and Factor AnalysisII. Cattell: A data driven approachIII. Cattell’s ClassificationIV. Cattell’s ContributionsV. ProblemsCurrent LectureCattell and Factor AnalysisCattell: A data driven approach1. A quantitative psychologist: sought the ‘g’s of personality2. Trait= fundamental unit of personalitya. Def: relatively stable reaction tendency3. Lexical hypothesis: language evolved to capture most relevant aspects of personalitya. Recall Allport’s observation (18k) descriptorsb. From 4,500 adjectives: removed synonymsc. Collected ratings, factor analyzed 171 traitsi. Cattell sought to ‘reduce’ these ‘data’4. Factor Analysis: Examines latent factors that drive relations among variablesa. Calculate a correlation coefficient between two variables (e.g., ‘friendly’,’outgoing’):b. Examine shared variance (patterns of relationships) among several variablesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.c. Shared variance means variables are related i. Relationship driven by latent factorii. Named factor= personality traitCattells Classification:1. Started with Allport and Odbert’s boiled down list2. 16 ‘source traits’ form basic personalitya. derived from Factor Analysis: Cattell identified with alphanumeric labels not wordsCattells contributions:1. championed advanced statistical techniques2. emphasized the importance of carefully collected data from multiple sourcesProblems?:1. Is 16 enough? Too much?2. Where’s motive?3. Although rigorous, factor analysis without context has limited utilitya. Factor
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