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12+Experiments - EXPERIMENT RESEARCH Ron Sandwina Ph.D...

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EXPERIMENT  RESEARCH Ron Sandwina, Ph.D. Communication Studies Department IUPUI
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Experiment Research Defined n The investigation of relationships among variables in a controlled setting.
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Purposes n Experiments are used to provide evidence that two variables are related to each other. q Theories provide statements about the relationships among variables. Experiments provide compelling evidence that indeed these relationships exist. q By controlling extraneous variables a researcher can make the argument that two variables are related. Only an experiment can control extraneous variables.
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Classic Experimental Design q The classic experimental design provides a way to test whether or not variables are related to each other. Group 1 R X O 1 Group 2 R O 2 Time R = Randomization to a condition X = The exposure or introduction of the experimental stimulus. O = Observation, or measurement
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Additional Experimental Designs n Chapter 13 details a variety of experimental designs. Although we will not cover them in class, the material in chapter 13 will be on the next exam.
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