15_Ch14_Two-Factor_ANOVA_Independent

15_Ch14_Two-Factor_ANOVA_Independent - Two-Factor ANOVA...

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Unformatted text preview: Two-Factor ANOVA Independent Samples To be covered . . . One-factor vs. two-factor designs Main effect Interaction Variation components 3 F-ratios Effect size: 2 Assumptions One-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 Drug Placebo Tranquilizer One-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 Drug Placebo Tranquilizer 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 Drug Placebo Tranquilizer Hallucinogen One-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 Drug Placebo Tranquilizer 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 Drug Placebo Tranquilizer Hallucinogen 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 9 7 8 5 5 3 Drug Placebo Tranquilizer Hallucinogen Stimulant Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 Drug Placebo Tranquilizer Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 Drug Placebo Tranquilizer Phobic Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer Phobic Normal Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer Phobic Normal Phobia Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer Phobic Normal Phobia Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer Phobic Normal Phobia 2 Levels 2 Levels Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 4 2 3 5 4 3 4 2 3 5 4 3 12 11 11 9 8 10 Drug Placebo Tranquilizer Hallucinogen Phobic Phobic Normal Normal Phobia Phobia Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 4 2 3 5 4 3 4 2 3 5 4 3 12 11 11 9 8 10 Drug Placebo Tranquilizer Hallucinogen Phobic Phobic Normal Normal Phobia Phobia Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 4 2 3 5 4 3 3 4 4 3 4 6 Drug Placebo Tranquilizer 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 4 2 3 5 4 3 4 2 3 5 4 3 12 11 11 9 8 10 Drug Placebo Tranquilizer Hallucinogen Phobic Phobic Normal Normal Phobia Phobia 3 Levels 2 Levels Two-Factor Designs 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 4 2 3 5 4 3 4 2 3 5 4 3 12 11 11 9 8 10 Drug Placebo Tranquilizer Hallucinogen Phobic Normal Phobia Two-Factor ANOVA 2 X 3 ANOVA: 2 (Phobic vs. Normal) X 3 (Placebo, Tranquilizer, Hallucinogen) Main Effect 10 8 9 7 5 3 6 5 4 2 1 0 11 12 10 10 9 8 4 2 3 5 4 3 4 2 3 5 4 3 12 11 11 9 8 10 Drug Placebo Tranquilizer Hallucinogen Phobic Normal Phobia Main Effect Effect of one factor, ignoring the levels of the other factor Main Effect Effect of one factor, ignoring the levels of the other factor Although the design is more complex, we still want to answer the questions we would have with a one-factor design: Main Effect Effect of one factor, ignoring the levels of the other factor Although the design is more complex, we still want to answer the questions we would have with a one-factor design: Do the different drugs have different effects on how close a person will get to the snakes? Main Effect...
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15_Ch14_Two-Factor_ANOVA_Independent - Two-Factor ANOVA...

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