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Lecture 17 - Factorial Design 2

Lecture 17 - Factorial Design 2 - Psych 301W Lecture 17...

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Psych 301W – Lecture 17 Fall 09 - Wede Lecture 17– Factorial Design 2 The Three-Way Design Three-way ANOVA Involves three independent variables Each factor has two or more levels The ANOVA summary table includes Three main effects Three two-way interactions One three-way interaction The Three-Way Interaction When a three-way interaction is found, the two-way interactions and the main effects must be interpreted with caution. Having identified that the three IVs together influence the DV, we need to be careful if we remove one of the variables Factorial Designs Using Repeated Measures Any or all of the factors in factorial research designs may involve repeated measures. 2 x 2 between N=120 2 x 2 within N=30 2 x 2 mixed N=60 Mixed Factorial Design Some factors are between participants and some are repeated measures Repeated-Measures Factorial Design 1
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Psych 301W – Lecture 17 Fall 09 - Wede Mixed Factorial Design
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