PSYC 2360 Lecture Notes - Lecture 10: Statistical Power, Experiment, Dependent And Independent Variables
19 Jan 2017
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Chapter 10 experimental design - one way anova. The goal of manipulation is to see if changes in the independent variable lead to corresponding changes in the dependent variable. To establish causality, you need : 1. For one variable to cause another, changes in one variable must correspond to changes in another. Before we can infer that the former causes the latter, there must first be an association, or correlation, between an independent and a dependent variable: 2. The changes in the first variable must precede the changes in the second variable. That is, the cause must precede the effect: 3. Eliminating confounds (variables that may produce spurious relationships) One of the key advantages of conducting a true experiment is that researchers can make statements about cause and effect. Even if you can predict behaviour it is difficult to change behaviour if you don"t know the cause of the.
