RESEARCH METHODS THINKING CRITICALLY WITH PSYCHOLOGICAL SCIENCE
THE NEED FOR PSYCHOLOGICAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Use a repeated measures design
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Use an independent measures design with a large sample
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Use a control group
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Use an independent measures design with a small sample
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Detailed explanation-1: -In an experiment, the independent variable is the variable that is varied or manipulated by the researcher. The dependent variable is the response that is measured. One way to think about it is that the dependent variable depends on the change in the independent variable.
Detailed explanation-2: -Let’s take the example of “Test Scores”. You want to see the effect of studying or sleeping on a test score. In the example, “test score” is the dependent variable. “Studying” or “sleeping” is the independent variable because these factors impact how much a student scores on the test.
Detailed explanation-3: -What type of experimental design is affected by order effects? What can researchers do to address order effects and how does this fix them? Counterbalancing addresses order effects by varying the order in which the levels of the independent variable are presented to the participants.
Detailed explanation-4: -Internal Validity The purpose of an experiment, however, is to show that two variables are statistically related and to do so in a way that supports the conclusion that the independent variable caused any observed differences in the dependent variable.