Lambda4 (version 3.0)

kristof: Compute Kristof Coefficient

Description

A reliability coefficient used for tests that are easily split into three parts.

Usage

kristof(x, split.method = "triplet", missing = "complete", standardize = FALSE)

Arguments

x

Can be either a data matrix or a covariance matrix

split.method

Specify method for splitting items?

missing

How to handle missing values.

standardize

When TRUE Results are standardized by using the correlation matrix instead of the covariance matrix for computation.

Value

kristof

The Kristof estimate of reliability.

Split

The split used to obtain the reliability estimate.

References

Kristof, W. (1974). Estimation of reliability and true score variance from a split of a test into three arbitrary parts. Psychometrika, 39(4), 491-499.

Examples

kristof(Rosenberg, split.method="triplet")