ResearchMethods_2_Outline - PSYC 1101-I 01/21/2010 Outline:...

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PSYC 1101-I 01/21/2010 Outline: Research Methods Part 2 III. Research Methods 1. Experimental - continued vi. Manipulating more than one IV the effect of “Response Format” depends on the “Group Size” 2 IV’s (or more) can me studied simultaneously to determine such interactions What makes an experiment? Controlled group How to manipulate: by creating conditions to be compared with each other vii. Two basic ways to design an Experiment 1. Between-groups design: having different participants in each level (condition) ex: the effects of noise (versus quiet) 2. Within group design: ex: we can measure how accurately the same people type when exposed to noise and when in a quiet room ADVANTAGE: extraneous factors related to the participant are kept constant across IV levels (ex: effects of prior typing experience) DISADVANTAGE: what happens if you put people in the noise group first and then in the quiet condition? (ex: fatigue) Carry-over-effects: order of presentation of levels of IV can affect performance on DV a. Counterbalancing: the order of conditions is varied so that
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This note was uploaded on 07/14/2010 for the course PSYC 1101 taught by Professor Leader during the Spring '07 term at Georgia Institute of Technology.

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ResearchMethods_2_Outline - PSYC 1101-I 01/21/2010 Outline:...

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