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15 Cards in this Set
- Front
- Back
control group
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the condition of an experiment that contrasts with the experimental condition and serves as a comparison for evaluating the effect of the treatment
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correlation coefficient
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statistical measure of a relationship; reveals how closely they vary
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hindsight bias
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the tendency to believe, after learning an outcome, that one would have foreseen it.
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descriptive statistics
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used to describe the basic features of the data in a study
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inferential statistics
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provide ways of testing the reliability of the findings of a study and "inferring" characteristics from a small group of participants or people (your sample) onto much larger groups of people (the population)
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mean
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A measure of central tendency which is more commonly known as an "average"
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median
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A measure of central tendency that is defined as the midpoint in an array of numbers
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mode
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A measure of central tendency which is defined by the most common number in an array
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independant variable
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the experimental factor that is manipulated; the variable whose effect is being studied
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dependent variable
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the outcome factor; the variable that may change in response to manupilations of the independent variable
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range
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the difference between the highest and lowest scores in a distribution
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standard deviation
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a computed measure of how much scores vary around the mean score
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operational deviation
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a statement of the procedures (operations) used to define research variables
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scatter plot
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a graph cluster of dots, each of which represents the values of 2 variables. The slope of the points suggests the direction of the relationship between the 2 variables. The amount of scatter suggests the strength of the correlation.
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hypothesis
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a testable prediction, often implied by a theory
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