Cohen’s kappa measures the level of agreement between two raters or judges who each classify items into mutually exclusive categories. The formula for Cohen’s kappa is calculated as:
k = (po – pe) / (1 – pe)
where:
- po: Relative observed agreement among raters
- pe: Hypothetical probability of chance agreement
To find Cohen’s kappa between two raters, simply fill in the boxes below and then click the “Calculate” button.
Cohen’s Kappa: 0.2857