Chapter 2 Research Process Part 2 Aug 31 2011 Research Process steps cont Random sampling and random assignment RS RA Results of random sampling example Results of random assignment example Experiment Examples From book Greitemeyer 2009 song lyrics and helping Manipulation Results not in book Schneider et al 2001 harassment and heart rate Manipulation Results The Correlational Method determines if two variables are related Correlation coefficient Positive negative or no correlation Cannot make cause effect conclusions Often a third variable can explain relations between 2 variables under study Example Need experiments to determine cause effect Experimental Methods manipulate variables in attempt to examine cause effect About 3 4ths of Social Psych research Most is done in lab settings 2 distinguishing factors 1 2 Advantages of Correlational vs Experimental Research Adv of Corr Research 1 2 Adv of Exp Research 1 2 Step 4 Interpreting results Independent variables what is manipulated Examples Song lyrics study Harassment study Dependent variables observed to determine impact of IV Examples Song lyrics study Harassment study Subject variables cannot be manipulated Examples
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