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Part-whole correlation for numeric data frames

pwc.rd

Computes the part-whole correlation (correlation of an item with the whole scale except for this item)

Usage

pwc(dat)

Arguments

dat

a data.frame with numeric columns (items)

Value

A data.frame with three columns: First column item identifier, second column with conventional item-scale correlation, third column with part-whole correlation

Examples

dat <- data.frame ( item1 = c(0,1,1,3), item2 = c(2,3,1,3), item3 = c(1, NA, 3,3))
pwc(dat)
#>    item      corr partWholeCorr
#> 1 item1 0.9801539     0.7505683
#> 2 item2 0.5918640     0.1177603
#> 3 item3 0.7559289     0.5000000