Notes 3-6-08 - Personality Psych Lecture March 6 2008...

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Personality Psych Lecture March 6, 2008 Stats… -Curvilinear relationships between 2 variables. If you practice TOO much, get bored and performance goes down. -Correlation does NOT necessarily mean causation. -Truncated range (restricted range of variable, ex. SAT scores of only super high scores vs. brain size) Validity of Psychological Tests -Does the test measure what it’s supposed to measure? Is the test accurate? I. Content Validity: (Can’t measure statistically, theory) Are all aspects of the construct covered in the test? -do items do a good job of asking about the whole construct? -internal reliability; want a cluster of correlation. II. Criterion Validity: (Most Important) does the test correlate with other behaviors it SHOULD correlate with? a. Concurrent Validity: Take personality test and correlates it with other behaviors at the same time. b. Predictive Validity: Measure other behavior at DIFFERENT time. Difference of timing between concurrent and predictive.
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Notes 3-6-08 - Personality Psych Lecture March 6 2008...

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