Mar 18, 2019
z scores
standardizes scores from the distributions
enables comparisons among different tests
z = (x - μ)/σ
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z scores
standardizes scores from the distributions
enables comparisons among different tests
z = (x - μ)/σ
validity
ability of a test to measure what it is intended to measure
criterion related validity
predictive validity, measure of future performance
construct validity
extent to which evidence shows that a test measures a particular hypothetical construct (abstract)
content validity
degree to which the content of the test is representative of the domain it is supposed to cover
percentile scores
indicate the percentage of scores within a specific comparison group that are lower than an individual test taker's score
ex. 75th percentile means one’s score is better than 75% of test takers
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