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...Show More