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| Manipulate independent variable and measure dependent variable to find cause-effect relationship |
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| Evidence gathered by careful observation, experimentation, and measurement. |
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| Observed events are carefully documented w/out interference |
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| A single instance of a situation analyzed in depth |
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| Investigation requires participants to answer specific questions |
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| Neither the participants nor experimenters know which group (test or control) the subjects are in |
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| The distance of sample results from the mean. A measure of variability. |
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| A group of subjects selected purely through chance |
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| A sample obtained to reflect the distribution of variables (ethnicity, class, age, etc.) |
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| A number between 1 and -1 that shows the degree of relationship between two variables. 0.99= very related, 0.01=not related at all, -0.99= very negatively related (as one goes up, the other goes down) |
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| Statistical techniques that assess whether or not results are reliable |
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| How widely results are spread out (similar to range) |
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| The antithesis: if the hypothesis = rats on these meds are so affected, the null hypothesis = rats on these meds aren't affected |
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| A false positive: rejects a true null hypothesis |
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| False Negative: fails to reject a true null hypothesis |
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