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- Correlation Correlation
A statistical measure of the extent to which two statistical factors predict each other. factors Examples: intelligence and achievement? IQ and drug use? extraversion and risk-taking? drug Why do we use correlation? 1. When experimentation is unethical. 2. When experimentation is impossible or too When difficult. difficult. 3. When you’re looking at traits that can’t be When controlled. controlled. Limitation: Does correlation mean causation?
- Experimentation Experimentation
An investigator manipulates one or more An factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable). dependent Basic Terms: Experimental Condition – exposes participants Experimental to the exp. treatment. to
- Control Condition – contrasts with the exp. Control condition and serves as a comparison for evaluating the effect of the treatment. evaluating Random assignment Random Independent variable (IV) – the exp. factor that Independent is manipulated; the variable whose effect is being studied. being Dependent variable (DV) – the exp. factor that Dependent is being measured; the variable that may change in response to manipulations of the IV’s. IV’s. 1.. 1 2. 3. 4. Effects of stress on diet? Effects of group size on willingness to speak up? Effects of nagging on completion of chores? Effects of sleep on cognitive skills?...
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- Spring '08