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17 Cards in this Set
- Front
- Back
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Correlation |
the degree of relationship between 2 traits, behaviors, or events |
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Correlational Study |
a study designed to determine the correlation between 2 traits, behaviors, or events |
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Correlation coefficient |
quantity that gives quality of a least squares fitting to the data |
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Scatterplot |
graph of data from a correlational study; created by plotting pairs of scores from each subject; |
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Regression line |
the line of best fit; represents the equation that best describes the mathematical relationship between two variables measured in a correlational study |
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What is the coefficient of determination? |
estimates the amount of variability in scores on one variable that can be explained by the other variable; an estimate of the strength of the relationship between variables |
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What is linear regression analysis? |
estimate a score on one of the measured behaviors from a score on the other |
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multiple regression analysis |
used to test the relationship between several predictor variables; used to predict behavior measured by one variable based on scores of 2+ variables |
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partial correlation |
when we want to hold one variable constant to measure its influence on a correlation between two other variables |
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multiple correlation |
when seeing if here is a relationship between 3 or more variables
R |
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factor analysis |
a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved variables |
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ex post facto study |
explores naturally occurring characteristics, behaviors, or effects in pre-existing groups of subjects |
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non-equivalent groups design |
compares the effects of different treatment conditions on pre-existing groups of subjects |
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longitudinal design |
investigates changes across time by measuring behavior of the same group of subjects at different points in time |
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cross-sectional study |
investigates changes across time by comparing groups of subjects already at different stages at a single point in time |
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pre-test-post-test design |
explores the effects of an event/treatment by comparing behavior before and after the event/treatment |
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Solomon four-group design |
adjusts for the pre-test-post-test difficulties; 1: pretest, treatment, posttest 2: Pretest, posttest 3: treatment, posttest 4: posttest |
