PSY-311: Complex Research Designs

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5 Terms

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Main effect

The effect of one IV onto DV, ignoring any other IV; you have a main effect if an IV has the same effect in all conditions of the other IV

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Factorial design

Examine influence of multiple IVs

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Interaction effects

When the effect of one IV depends on a group (condition) of the other IV

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Cross-over interaction

When IV has opposite effect in one condition of the second IV than the other (ex. caffeine has a positive effect for sleep deprived people but negative effect for people that got sleep

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Ordinal interaction

When IV has a stronger effect in one condition of the second IV than the other (ex. support always decreases stress for everyone, but it has a stronger effect for younger people