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Unformatted text preview: o E.g., The Third Variable Problem Smoking and depression (and anxiety) • Experimental study o Used to establish cause and effect o How to: Create 2+ conditions: • Experimental Group • Control Group o 3 requirements for valid experiment 1. Manipulate IV (independent variable) and measure DV (dependent variable) 2. Control over experimental situation • extraneous variables- other variables that may influence DV • e.g., characteristics of situation • e.g., characteristics of subjects • Noise VS: confounding variables 3. Random assignment of subjects to groups o •...
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- Spring '08
- Microeconomics, Causality, Correlation and dependence, Pearson product-moment correlation coefficient, Spearman's rank correlation coefficient, Statistical dependence