rev4exam1 - 031:010 Research Methods in Psychology Spring...

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031:010 - Research Methods in Psychology Spring, 2010 Feb 9 th
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Outline Big Picture in Two Pictures Technical Terms (i.e., definitions) Details Exam 2
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simple, coherent set of data theory of interest actual (raw) measures of subject(s) “pre - processing” operational definition 3
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population sample summary of the sample descriptive statistics inferential statistics
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Technical Terms operational definition construct validity = convergent validity + discriminant validity convergent = exhaustive (content) + (predictive) correlations discriminant = exclusive (content) + ( non -predictive) correlations descriptive vs inferential statistics summaries vs best guesses statistical conclusion validity did you make a Type I or Type II error? 5
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Science ( in general ) psychological progress is incremental and research in a given area goes through phases psychologists make assertions that can be shown to be wrong using data; conclusions are tentative psychological research involves all three ways of knowing, but at different points we must agree on the data, which are probabilistic 6
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