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Lecture 15 - Experimental Design 2

Lecture 15 - Experimental Design 2 - Psych 301W Lecture 15...

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Psych 301W – Lecture 15 Fall 09 - Wede Lecture 15– Experimental Design 2 Repeated-Measures Designs Within-participants or Within-subjects design One-Way Repeated-Measures Experimental Design A one-way experimental design where the same participants are used in all levels of the independent variable. Advantages and Disadvantages of Repeated-Measures Designs Advantages Economy of participants Disadvantages ________________ - The effects of one level of the manipulation are still present when the dependent measure is assessed for another level of the manipulation Practice Fatigue Dealing with Carry Over Complete Counterbalancing (balanced across individual subject) Incomplete Design (different order for different subjects) Complete Counterbalancing Block Randomization Break up the number of times the participant is exposed to the various levels into blocks Size of the block = # conditions Example IV: encoding strategies with 3 levels Imagery, rehearsal, control Want to expose you to these techniques 4 dif times 1
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