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12 Cards in this Set
- Front
- Back
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What is different in an experiment and a correlational study in terms of how we examine the relationship?
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In experiments the researcher computes the mean of the dependent scores(Yscores) for each condition of the independent variable (each X score); in correlational studies the researcher examines the relationship over all X-Y pairs simultaneously by computing a correlation coefficient.
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What is a scatterplot?
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A graph of the individual data points formed from a set of X-Y pairs.
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What is the regression line?
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The summary straight line that best fits through the scatterplot.
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Define a positive linear relationship.
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As the X scores increase, the Y scores tend to increase.
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Define a negative linear relationship.
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As the X score is increase, the Y scores tend to decrease.
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Define a curvilinear relationship.
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As the X scores increase, the Y scores do not intend to only increase or only decrease.
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What is concurrent validity?
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The extent to which the procedure correlates with an individual's present behavior.
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What is convergent validity?
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The extent to which the scores obtained from one procedure are positively correlated with scores obtained from another procedure that is already accepted as valid.
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What is correlation coefficient?
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A statistic or number that describes the important characteristics of a relationship.
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What is criterion validity? What are the two sub-types of criterion validity?
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The extent to which a procedure correlates with a behavior. Concurrent validity and predictive validity.
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What is a curvilinear relationship?
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As the X scores change, the Y scores do not tend to only increase or only decrease.
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What is discriminant validity?
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The extent to which scores obtained from one procedure are not correlated with scores from another procedure that measures other variables or constructs.
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