PNB 3RM3 Lecture 29: PNB 3RM3 - Lecture 29 - Factorial Design 2
12 Jul 2017
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Document Summary
Generalizability - to test whether variable of interest acts on the dv in the same way across different types of people and situations. Testing for moderators allows us to test the limits of our data - indicate when and under what conditions your relationship works. Moderator asks what changes between x and y. If you discover interaction, you have a moderator. Moderators: variables that change the relationship between two other variables. Theories make a statement about how different variables interact to produce an effect. Single-factor experiments don"t get to why an effect exists. Main effects: overall effect of one iv on the dv averaged across the levels of the other iv. Average results of one iv across levels of the other iv (look at chart). See if means are significantly different to see if there exists a main effect for the iv. Detecting interactions from a table - look at difference scores.
