A contingency Table is a 2x2 matrix that contains the counts of all combinations of positive and negative ratings made by two raters.

`contingencyTable`

The contingency Table is an object of class matrix with two rows and two columns. The ordering of the combination vector input to the matrix is as follows: c(Rater1Positive & Rater2Positive, Rater1Negative & Rater2Positive, Rater1Positive & Rater2Negative, Rater1Negative & Rater2Negative).