PSYCH 2B03 Lecture Notes - Lecture 24: Factor Analysis, Extraversion And Introversion, Psychodynamics
11 Feb 2019
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Correlation matrix: factor analytic theories are based on a mathematical technique called factor analysis. Identifies patterns of intercorrelated variables, and models how such patterns could be accounted for by hypothesizing a small number of factors underlying and contributing to the correlated variables. If f2 includes some of the same variables as f1 they are related or non-orthogonal. If f2 is completely different than f1 than it would be orthogonal (unrelated) What factor analysis does: does not find real" things, does not identify factors, not necessarily traits (can do for other theories ex. What makes a factor basic"? (costa & mccrae, 1992: reliable: stable over time and observers, used by both theorists and laypersons, appear across cultures, must have some biological basis. Change in big five factors with age (roberts et al, 2006) Increase social dominance (extraversion: up especially between 20 and 40. Increase conscientiousness: up especially between 20 and 40. Increase emotional stability (nerutoicism: up especially between 20 and 40.
