Chapter 6 Reliability

Spearman Brown Prophecy Formula - when the "correction factor" (N) is set at "2," it corrects the split half reliability coefficient. Corrected roe = (2) (r) / 1 + (2 - 1) (r) B. Guttman Formula - Use of Pearson's r for split half reliability assumes the variances of the two halves are about equal. If not, do not use. ................
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