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AP Psychology Terms: Research Methods
Flash Cards taken from chapter 2 of AP Psychology Crash Course by Larry Krieger
5
Psychology
11th Grade
05/01/2011

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Term
Confounding Variable
Definition
Variables that have an unwanted influence on the outcome of an experiment. AKA extraneous variables.
Term
Correlation Research
Definition
The researcher observes or measures two or more naturally occuring variables to find the relationship between them. In correlation research, the researcher does not directly manipulate the variables.
Term
Normal Distribution
Definition
Bell-shaped curve with half over the mean, and half under the mean
Term
Positively (Negatively) Skewed Distribution
Definition
Contains a predonderance of scores on the low (high) end of the scale. The mean will be higher (lower) than the medium in a positively (negatively) skewed distribution.
Term
P-Value
Definition
The probablity of concluding that a difference exists when in fact the difference does not exist. A statistically significant difference is a difference not likely due to chance. By consensus, this is something that would only show up =<5% of the time. Smaller p-value = more significant results.
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