Complex designs 3.3

Complex designs 3.3 - Click to editMethods Research Master...

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6/3/11 Click to edit Master subtitle style Experimental Design: Complex Designs Research Methods PSYC E226 3/3/2010
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6/3/11 Learning Objectives Understand what factorial design is Be familiar with between subjects and combined strategies designs Be able to identify the variables and levels of variables in studies Know the difference between main effects and interactions of factorial design Understand two reasons why
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6/3/11 Factorial Design We have covered designs with one IV and one DV Factorial design is research with two or more independent variables Each IV is called a factor Two-factor design is when there are two IVs There is still one dependent variable
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6/3/11 Factorial Design: Example Example: A study that looks at whether drinking coffee after alcohol can increase performance. There are six conditions, where there are three levels of the caffeine variable, and two of the alcohol variable Hypothesis: People who drink coffee and alcohol will perform better than people who drink just alcohol. IV: what is consumed DV: Performance
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6/3/11 Examining factorial design
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6/3/11 Describing Factorial Design Different conditions of the IV are called levels Factorial design is described by how many levels there are for each IV The previous example is a 2x3 factorial design, because there are two levels of the alcohol variable, and 3 levels of the caffeine variable When all participants are assigned to
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Complex designs 3.3 - Click to editMethods Research Master...

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