Description Usage Arguments Details Value Examples
View source: R/dependability.R
Calculate Subkoviak's (1988) single administration consistency indices
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data |
A data frame of dichotomously scored test items |
items |
Raw column indices representing the test items or number of items on the test (see Details) |
raw_cut_score |
The raw cut-score for the test |
total |
Total score column of the test (see Details) |
look_up |
If TRUE, the agreement and kappa tables from Subkoviak (1988) are returned with the results |
When the item-level information is available, Kuder-Richardson 20 is used as an estimate of alpha. If only the total scores on the test are available and the number of items is known, Kuder-Richardson 21 is used as an estimate of alpha.
The z_cut
score and the rounded z_cut_rounded
score for the test
The estimated alpha coefficient. K-R21 is used when there is no item-level information. Otherwise, K-R20 is used.
The rounded values for the agree_coef
(agreement) and kappa_coef
(kappa) coefficients from Subkoviak's (1988) tables
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