Types of Relationships. Social scientists are interested in discovering functional relationships between variables. In particular, researchers look for: correlations (association, covariation) among vaariables differences between groups or conditions. The nature of causation.
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Note: “3/4 rule”
the convention is
to make the Y axis
3/4 of the length
of the x axis
A characteristic feature of non-significant interaction effects is that the lines are parallel, or nearly parallel
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