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"Experimental Design: Internal Validity" icon

Experimental Design: Internal Validity

from site ... "This tutorial is a component of the courseware of the Psychology Centre of Athabasca University. The tutorial is used in Athabasca University’s Psychology 404 (Experimental Psychology).  In Part 1 of this tutorial, you will be introduced to nine sources of threat to internal validity. (Campbell, 1969; Campbell & Stanley, 1963) First, some relevant terms are defined. Then, some background explanation for a hypothetical experiment is presented. Finally, each of the nine threats is described, followed by an example and a contrasting nonexample as applied to the hypothetical experiment. An explanation is included of why the example represents a threat to internal validity and why the nonexample is not a threat. In Part 2 of this tutorial, you will be asked to classify 36... Show More


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