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1

The is the approach used by psychologists to systematically acquire knowledge and understanding about behavior and other phenomena of interest.
2

If you were to engage in a successful research study, you would need to be careful that your subjects were not aware of your interest in them or their behavior.
3

A sample of just a few thousand voters is sufficient to predict within one or two percentage points who will win a presidential election--if the sample is .
4

The is the variable that is measured and is expected to change as a result of the experimenter's manipulation of the .
5

Through various statistical tests, researchers can determine when differences between experimental groups are large enough to be considered and if it is possible to confirm a hypothesis.





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