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Unformatted text preview: Do people recognize positive or negative words more quickly?) Use more than one dependent variable Manipulate two independent variables Strength in Experimental Research Conclusions about cause-effect can be made. Weaknesses Nature of experiments are relatively artificial. There are ethical issues/limits concerning experiments. Correlational Studies Correlational studies identify associations between variables. These kinds of studies are useful when one cannot manipulate the independent variable. Two alternative explanations in correlational findings: Third-variable complication (extraneous variable) Directionality (reverse causality problem) Perhaps some people just have tendencies that are unrelated to the study. **Correlation does not equal causation!...
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- Fall '08