Complex Experimental Design

Complex Experimental Design

1. Assignment Procedures

   • Independent groups design
     • All Independent Variables (IV) are manipulated as independents
       •          1  1   A 2  
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   • Repeated measures design
     • All IV's are manipulated and measures are repeated
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   • Mixed factorial design
     • One IV is manipulated in a independent group design
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     • One IV is manipulated in a Repeated Measure Design
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2. Increasing the complexity!

   • The more complex the design, the more difficult it is to interpret
     • Known as higher order factorials: more than two independent variables
       • Notated like this ________x__________
         • The number of IV
         • The number of levels of each of the IV
           • Examples of higher order factorials
             • 2X3 Factorial Design
             • 2 X 2 X 2 Factorial Design
               • 8 Conditions
                 • • For this design, you will have to look into more relationships since there is more IV
                     • Two-Way Interactions
                       • Instruction Method X Gender, Gender x Class Size, Instruction Method x Class Size
                     • Three way Interactions
                       • Instruction Method x Gender x Class Size
                 • In order to graph a Three-Way Interactions,you will need to make two side-by-side line graphs
                   • Online X Class Size X Gender
                   • Face-to-Face x Class Size x Gender

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