Lambda4: Collection of Internal Consistency Reliability Coefficients.

Description

Currently the package includes 14 methods for calculating internal consistency reliability but is still growing. The package allows users access to whichever reliability estimator is deemed most appropriate for their situation.

Arguments

Functions

angoff: Compute Angoff Coefficient
bin.combs: Generate Unique Binary Combinations
cov.lambda4: Compute Covariance Maximized Lambda4
impute.cov: Compute Covariance Matrix
kristof: Compute Kristof Coefficient
lambda1: Compute Guttman's Lambda 1 Coefficient
lambda2: Compute Guttman's Lambda 2 Coefficient
lambda3: Compute Guttman's Lambda 3 Coefficient (Coefficent Alpha)
lambda5: Compute Guttman's Lambda 5 Coefficient
lambda6: Compute Guttman's Lambda 6 Coefficient
lambdas: Compute Guttman's Lambda Coefficients
omega.tot: Compute McDonald's Omega Total
quant.lambda4: Compute Quantile Lambda 4
raju: Compute Raju's Coefficient
user.lambda4: Compute User Specified Lambda 4 (Split-Half)

References

Cronbach L (1951). "Coefficient Alpha and the Internal Structure of Tests." Psychometrika, 16, 297-334.

Guttman L (1945). "A Basis for Analyzing Test-Retest Reliability." Psychometrika, 10, 255-282.

Callender J, Osburn H (1977). "A Method for Maximizing and Cross-Validating Split-Half Reliability Coefficients." Educational and Psychological Measurement, 37, 819-826.

Callender J, Osburn H (1979). "An Empirical Comparison of Coefficient Alpha, Guttman's Lambda2 and Msplit Maximized Split-Half Reliability Estimates." Journal of Educational Measurement, 16, 89-99.

Sijtsma K (2009). "On the Use, Misuse, and Very Limited Usefulness of Cronbach's Alpha." Psychometrika, 74(1), 107-120.