17 - Experimental Designs Reviews & More 9/17/08 Note:...

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Experimental Designs 9/17/08 Note: for test, know how to id the different research methods. Experimental Methods -When are experiements appropriate? - When your focus is a how an iv affect an dv. - Trying to explain causal explanation Basic Setup of an Experiment - We try to manipulate iv to determine affect on dv. Confounding Variable - What are they? - A variable that can explain what is seen. - What do you want to do with them in the context of an experiment? - Which types of validity of an experiment/study do confounding variables threaten? - It could affect the way the experiment happens/the design. - INTERNAL validity? Ruling out Alternative Explanations - Internal Validity- Have I ruled out or controlled for other reasons that could be giving me these results? - External Validity- How research from one internally valid study might be generalizable to another context. Tension between external and internal validity. - As you increase external validity, you open threats to internal
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17 - Experimental Designs Reviews & More 9/17/08 Note:...

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