Order_and_Expectancy_effects_-_notes_version

Order_and_Expectancy - Repeated Measures designs All participants are exposed to each experimental condition DV Participant Condition A DV

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8/17/2010 1 Order and Expectancy effects Repeated Measures designs All participants are exposed to each experimental condition DV Problematic due to order effects: Participant Condition A Condition B Condition C Order effects Practice effects Fatigue effects Contrast effects Order effects - example Spatial cognition Hypothesis: listening to certain types of music might affect performance on this task Classical Country Country music increases performance because people that listen to country music are used to people/things leaving:
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8/17/2010 2 Dealing with Order Effects Complete Counterbalancing – Present the different conditions in every possible order For 2 conditions only 2 possible orders Larger number of orders requires more subjects Need to have sufficient sample size in each order Since we have only two conditions, complete counterbalancing possible Order effects - example Randomly assign subjects to one of two orders: Participant Condition A Condition B DV A = Classical B = Country Participant Condition A
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This note was uploaded on 12/18/2010 for the course PSY 7 taught by Professor Sherman during the Summer '09 term at UCSB.

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Order_and_Expectancy - Repeated Measures designs All participants are exposed to each experimental condition DV Participant Condition A DV

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