alpha                   Calculate Cronbach's Alpha from a correlation
                        matrix or dataframe
correlateScales         Create a dataframe of correlated scales from
                        different dataframes of scale items
eigenvalues             calculate eigenvalues of a correlation matrix
                        with optional scree plot
lcor                    Rearrange columns in a data-frame to fit a
                        predefined correlation matrix
lexact                  Deprecated. Use lfast() instead
lfast                   Synthesise rating-scale data with predefined
                        mean and standard deviation
makeCorrAlpha           Correlation matrix from Cronbach's Alpha
makeItems               Synthetic rating-scale data with given first
                        and second moments and a predefined correlation
                        matrix
makeItemsScale          scale items from a summated scale
