Topic 4 Methods and Research Strategies for BLACKBOARD

Topic 4 Methods and Research Strategies for BLACKBOARD -...

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6/14/11 Experiments Two hallmarks of experiments 1. Random assignment two or more 2. Procedural control Only difference between conditions is the factor the researcher is interested in studying conditions
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6/14/11 Experiments 1. Purpose of random assignment Controls for existing differences among people by making groups “statistically identical”
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6/14/11 E xperiments 2. Purpose of procedural control By holding constant variables other than IV, can be certain the differences result from IV rather than “extraneous” variables. Example: hand size & crime
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6/14/11 Internal Validity researcher is getting at relationship she thinks she’s getting at Relationship between IV/DV not affected by extraneous variables. temperature and crime in the South Causation vs. correlation
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External Validity How well conclusions generalize to other people, places, and times. Two types:
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This note was uploaded on 06/14/2011 for the course SOCY 101 taught by Professor Simpson during the Fall '07 term at South Carolina.

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Topic 4 Methods and Research Strategies for BLACKBOARD -...

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