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First choice Experiment Or Quasi-experiment
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IV between-subjects or within-subjects Between Within IV manipulated or Subject? IV manipulated or Subject? Manipulated Subject Manipulated. Forming equivalent Groups by… Groups not Equal How often tested Per condition Possible matching? Random assignment Matching >once once Repeated measures Independent groups Matched groups Non-equivalent groups
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IV between or within Within Between At least one of each
Some manipulated Some subject IV between or within Within Between At least one of each IV manipulated or Subject? IV manipulated or Subject? Manipulated. Manipulated Subject Some manipulated Some subject How often tested Per condition Forming equivalent Groups by… Groups not Equal >once once Possible matching? Random assignment Matching Full/partial counterbalance Reverse/Block counterbalance Independent groups Matched groups Non-equivalent groups Repeated measures P X E Factorial
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IV between or within At least one of each IV between subject Or manipulated? subject manipulated Mixed P X E factorial Mixed factorial
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