spearman_brown {xxIRT} | R Documentation |
Use Spearman-brown formula to compute the predicted reliability when the test length is extened to n-fold or reversely the n-fold extension of test length in order to reach the targeted reliability
spearman_brown(n, rho)
spearman_brown_reverse(rho, target)
n |
extend the test length to n-fold |
rho |
the reliability of current test |
target |
the targeted reliability |
spearman_brown(2, .70)
spearman_brown_reverse(.70, .85)