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Chapter 8 review psychology

Chapter 8 review psychology - themselves c Advantages and...

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1) `Chapter 8 review psychology a) Confounding and internal validity i) Experiments are meant to be kept valid (1) This is achieved through either experimental control or randomization ii) COUNFOUNDING VARIABLES are variables in an experiment that have the propensity to ruin the validity of an experiment (1) They are described as variables that vary along with the independent variable, therefore they carry the propensity to alter it iii) INTERNAL VALIDITY (1) An experiment in which only the internal validity can alter the results b) Basic Experiments i) Posttest-only design (1) Two equivalent groups of participants (2) Independent variable (3) Study the results of the effect of the independent variable (a) Selection differences (i) The people selected for the two groups cannot differ in any noticeable way 1. High income participants in one, low in the other ii) Pretest-posttest (1) The only difference here is that the participants are given a pretest to evaluate their outlooks on the experiment, or to in some way evaluate the participants
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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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