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20 Cards in this Set
- Front
- Back
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True experiments
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Random assignment + manipulates IV levels
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Quasi-experiments
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No rando samples, no definitive statements, BOO!
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Correlational studies
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IV is not manipulated; just trying to find a relationship between variables
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Within-subjects design
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Each subject is exposed to more than 1 IV level
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z-score
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me-mean/SD
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Variance
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SD^2
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T-scores
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If mean is 50, SD = 10
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In a normal distribution, the mean, median, and mode are...
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IDENTICAL!
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Type I error
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Mistakenly reject null hypo
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Type II error
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Mistakenly accept null hypo
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T-test
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Compare the means of 2 groups
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ANOVA
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Compare the means of multiple groups (more than 2)
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Chi-square
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Tests equality of 2 proportions; categorical (e.g. gender); measured NOMINALLY
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Norm-referenced vs. domain/criterion-referenced testing
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GREs vs. driving exam
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High reliability means...
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The same kid will get the same score
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High validity means...
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The test is actually testing what it should be testing
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Ordinal scale
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Ranked ("in order") (e.g. order of winners in a race)
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Nominal scale
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Categorical (e.g. political affiliation)
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Interval scale
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Equal intervals (e.g. temperature)
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Ratio scale
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Equal intervals with true zero (e.g. salary)
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