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Nuts & Bolts Plan for TodayCumulative review

Lecture (Block 95; Tomarken 95)Measuring T&PSome problems with wordsSome problems with physiological measures of T&P,

Just Because Youre Measuring the Brain (or HPA axis, or facial musculature, etc) Doesnt Mean You Can Stop Using Your Head John Cacioppo, past present of the Assoc for Psychol Science

Take-home critical thinking questionsNuts & Bolts Plan for TodayLecture (Block 95; Tomarken 95)Measuring T&PProblems with wordsProblems with physiological measures of T&P

Just Because Youre Measuring the Brain (or HPA axis, or facial musculature, etc) Doesnt Mean You Can Stop Using Your Head John Cacioppo, past present of the Assoc for Psychol Science

Take-home critical thinking questionsNuts & Bolts Plan for TodayLecture (Block 95; Tomarken 95)Measuring T&PProblems with wordsProblems with physiological measures of T&P

Just Because Youre Measuring the Brain Doesnt Mean You Can Stop Using Your Head John Cacioppo, past present of the Assoc for Psychol Science (APS)

Take-home critical thinking questionsNuts & Bolts Plan for TodayLecture (Block 95; Tomarken 95)Measuring T&PProblems with wordsProblems with physiological measures of T&P

Just Because Youre Measuring the Brain Doesnt Mean You Can Stop Using Your Head John Cacioppo, past present of the Assoc for Psychol Science (APS)

Take-home critical thinking questionsPSYC 210:

How Can We Discover and MeasureIndividual Differences in T&P?

AJ Shackman10 February 2015Todays Conceptual RoadmapWhere did the fundamental dimensions of T&P come from? How were they discovered? What are their limitations?

How should we measure T&P? What is the value of adopting biological measures?

What statistical properties do we need to assess if we turn to biological measures of T&P?

Todays Conceptual RoadmapWhere did the fundamental dimensions of T&P come from? How were they discovered? What are their limitations?

How should we measure T&P? What is the value of adopting biological measures?

What statistical properties do we need to assess if we turn to biological measures of T&P?

Todays Conceptual RoadmapWhere did the fundamental dimensions of T&P come from? How were they discovered? What are their limitations?

How should we measure T&P? What is the value of adopting biological measures?

What statistical properties do we need to assess if we turn to biological measures of T&P?

Todays Conceptual RoadmapWhere did the fundamental dimensions of T&P come from? How were they discovered? What are their limitations?

How should we measure T&P? What is the value of adopting biological measures?

What statistical properties do we need to assess if we use biological measures of T&P?

From Measures to Models The Case of the 5 Factor Model, or,

How did we get the factors thatwe were given?

Why 5 Factors? Words, words, words Lexical Hypothesis,"All aspects of human personality which are or have been of importance, interest, or utility have already become recorded in the substance of language Cattell

Common speech is a poor guide to psychological subtleties Allport

Why 5 Factors? Words, words, words Lexical Hypothesis,"All aspects of human personality which are or have been of importance, interest, or utility have already become recorded in the substance of language Cattell

Common speech is a poor guide to psychological subtleties Allport

Why 5 Factors? Words, words, words Allport 1930s400,000 words in the unabridged dictionary 18,000 trait-relevant adjectives 4,500 key traits

Cattell 1940sUsed a combination of ad hoc subjective and statistical techniques to whittle it down to 35 scalesUsed factor analysis to reduce it to 12Set the stage for the discovery of the Big 5 (OCEAN)

Why 5 Factors? Words, words, words Allport 1930s400,000 words in the unabridged dictionary 18,000 trait-relevant adjectives 4,500 key traits

Cattell 1940sUsed a combination of subjective and statistical techniques to whittle it down to 35 scalesUsed factor analysis to reduce it to 12Set the stage for the discovery of the Big 5 (OCEAN)

Why 5 Factors? Words, words, words Factor AnalysisStatistical technique for compressing or reducing the number of dimensions in a dataset

e.g., 100 items on a questionnaire 5 latent factors or dimensions (95% compression)

Lossy compression technique: Retention of a small number of dimensions typically captures