Experimental design

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  • Created by: Emily
  • Created on: 21-05-13 15:33
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  • Experimental design
    • Independent Groups
      • Ppts randomly assigned one condition and only take part in that one.
      • ++ Avoids order effects high internal validity
      • -- ppts may be exaggerated and large numbers may be required
    • Match pairs
      • participants are matched through characteristics and one does one condition while the other takes oart in the second condition
      • ++ avoids order effects and minimises participant variables
      • -- difficult to match and does not eliminate ppt variables
    • Repeated measures
      • participants take part in both conditions
      • ++ fewer ppts needed and minimises ppt variables
      • -- order effects are likely, demand characteristics
  • Experimental design
    • Explanation
      • strengths
      • weaknesses

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