# PSYC 2030 Lecture Notes - Lecture 6: Factorial Experiment, Experiment, Regression Analysis

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2 Mar 2017
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## Document Summary

260-mistake matrix, presented means are incorrect---are all supposed to be same number. Anova: you can as many main effects as many independent variables. Perform anova to see if these effects are significant. Automatically know there is interaction effect when lines are not parallel, Ceiling effect: when the means for the 2 conditions is near the maximum and it can give the impression that no difference exists between conditions, i. e they"re close to maximum performance. May look at though an independent variable had no effect, but it would of been detected if better results were possible. Floor effect: opposite, when results are so low. For three independent variables---a b c, there will be 7 possible interaction effect sand. Completely between-subject design- both of your independent vairables are between subject variables. so if n=20 needed for one conditoin, n=80 needed for entire study needed for all study. Completely within subject design: all subjects tested under 4 conditions, so n=40.

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