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Chapter 1: Intro to Social Psychology. Part 3: Mon. Aug 27, 2012. Experimental Methods : how are these used? About 3/4ths of Social Psych research. 2 distinguishing factors of true experiments: 1. Control & manipulation of variables 2. Random assignment to groups – How is this done?
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Chapter 1: Intro to Social Psychology Part 3: Mon. Aug 27, 2012
Experimental Methods: how are these used? • About 3/4ths of Social Psych research. • 2 distinguishing factors of true experiments: • 1. Control & manipulation of variables • 2. Random assignment to groups – • How is this done? • What is its benefit?
Random assignment (RA)– into groups • eliminate other possible explanations for results How is it different from random sampling (RS)…? • Overview of results from RS and RA in our class:
In experiments, use IVs and DVs • Independent variables (IV): what is manipulated • Examples? • Dependent variables (DV): observed to determine impact of IV • Examples? • Subject variables: cannot be manipulated • Examples?
External validity – questions related to whether results will generalize • Depends on: • 1) Mundane realism – what is it? • Example? • 2) Experimental realism – what is it? • Example?
Ethics: Deception • Types of deception: • 1) False Purpose • 2) False Feedback • 3) Use of a confederate/actor • Benefits of deception? • Ethical concerns?
Ethics: Protecting Participants • Need to reduce stress for the participant • Cost/Benefit analysis – • Institutional Review Board (IRB) approves studies • Must obtain informed consent: