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8 Cards in this Set
- Front
- Back
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Factorial design=
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2 or more IV
1 DV examines effects of more than 1 IV, both individually and collectively, on the DV |
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Main effect
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effect of a single independent variable on the DV while ignoring other IV's
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Interaction
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present when the effect of one IV on the DV depends on the level of another IV
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sir ronald fischer
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agriculturist
created f-ratio to konw interaction of effects b/c crop yeild impacted by combination of variables |
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2 way factorial design
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2 IVs
Between subjects variables diferent participants assigned to each cell calculate mean score for each cell calculate marginal means |
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Null
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no difference among levels of IV A
no difference among levels of IV B no interaction between A and B |
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8 possible outcomes
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1.no sig.main effects, interaction not sign
2.sig main effect for variable A only 3.sig main effect for variable B only 4.sign main effct for variables A & B only 5.interaction is sign, main effects are not 6.sig main effect for variable A and interaction is sig 7.sig main effect for variable B and interaction is sig 8.both main effects and interaction are significant |
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7 Null hypothesis & 7 tests
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3 for main effects of IVs, A,B,C
3 two-way interactions; AxB, AxC, BxC 1 three-way interaction, AxBxC |
