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Understanding Main Effects and Interactions

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Presentation on theme: "Understanding Main Effects and Interactions"— Presentation transcript:

1 Understanding Main Effects and Interactions
March 19th, 2019 Mini Lesson 1 Katie Papazian & Nicoletta Memos

2 Objectives Calculate averages of individual participant data
Identify trends in the data using averages and bar graphs Interpret bar graphs showing the results of studies including identification of the axes, independent measures, dependent measure(s) Distinguish between main effects and interactions in bar graphs of data

3 Key Terminology What is a main effect?
Effect of a single Independent variable (IV) on a Dependent variable (DV) What is an interaction? Effect of one IV depends on the level of the second IV (Both IV’s combined produce a different effect than the IV’s alone)

4

5 Questions to Consider How does sample size affect results?
How powerful do you think our results are? Do you think the results from our example can be generalized to a larger population? Why or why not?

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