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3 Cards in this Set
- Front
- Back
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Item Response Theory (IRT)
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alternate to Classical Test Theory. Ratings reported on the trait being measured and not whole test score.
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Item Characteristic Curve (IRC)
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Constructed for each item
item's ability to distinguish between hi and low achievers indicated by slope of the curve. |
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What can you tell by the IRC?
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difficulty level, discrimination, and probability of guessing correctly (by where curve intercepts vertical axis.
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