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Unformatted text preview: themselves c) Advantages and disadvantages of the 2 designs i) Mortality (1) Sometimes participants drop out of an experiment for reasons unrelated to the design, but usually it is for reasons related to the design (a) EX: smoking related experiment may cause the heavier smokers to drop out because of pressure ii) Solomon four group design (1) Basically a combination of all the four groups, with a group that gets a pretest and posttest, one that gets no pretest, and then measuring the control and experimental of both iii) Independent groups design (1) Each participant is randomly assigned to one of the independent groups iv) Repeated measures design (1) Each participant is measured after engaging in each level of the experiment d) Independent groups design i) When you randomly assign people to groups e) Repeated measures design i) When you measure participants at each level of a study f)...
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- Spring '08
- Psychology, Solomon, internal validity, Science Experiments