Reliability function similar to the SPSS RELIABILITY command

This function was developed to offer a function that roughly works similar to the SPSS RELIABILITY command.

reliability(data,
            items = NULL,
            itemDiagnostics = FALSE,
            digits = 2)

Arguments

data	The dataframe containing the variables (items, questions) of interest.
items	Optionally, the variables (items, questions) of interest. If omitted, all variables (items, questions) in the dataframe will be used.
itemDiagnostics	Whether to also display the item diagnostics (specifically, the corrected item-total correlation, mean and variance excluding each item, and the reliability coefficients excluding each item).
digits	The number of digits to use when displaying the results.

See also

scaleStructure, the excellent psych package

Examples

# NOT RUN {
## (Not run to test because it takes a long time.)

data(testRetestSimData);
reliability(testRetestSimData[, 2:11], itemDiagnostics = TRUE);
# }