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6 Cards in this Set
- Front
- Back
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Name the key parts of the Item Characteristic Curve (ICC).
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1) Slope = discrimination
2) 50% correct = difficulty level 3) Y-intercept = guessing |
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What are the different measures of internal consistency reliability?
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1) Split half (underestimates true reliability) so use Spearman-Brown Prophecy formula to correct
2) Cronbach's coefficient alpha - conservative measure 3) Kuder-Richardson Formula 20 - used when test items scored dichotomously |
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What factors impact the reliability
coefficient? |
1) Test length (longer is better)
2) Range of test scores (best when unrestricted) 3) Guessing (as prob that guessing is correct increasing, reliability decreases) |
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What comparisons are made in a multitrait-multimethod matrix?
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1) Monotrait - monomethod coefficient
2) Monotrait - heteromethod coefficient 3) Heterotrait - monomethod coefficient 4) Heterotrait - heteromethod coefficient |
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How much variance do factor loadings and communality predict?
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1) Square factor loading to variability based on individual factors (e.g., 0.4 = 16% variability)
2) Communality is NOT squared (e.g., 0.50 = 50% variability from combo of factors) *reliability is AT LEAST as big as communality |
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What are the common methods for score adjustment?
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1) Bonus points
2) Separate cut offs 3) Within-group norming 4) Top-down selection from separate lists 5) Banding |
