Kappa (disambiguation)

Kappa may refer to:

• Fleiss' kappa [r]: Statistical measure for assessing the reliability of agreement between a fixed number of raters when assigning categorical ratings to a number of items or classifying items. ^[e]
• Kappa (Greek letter) [r]: The 10th letter of the Greek alphabet, written $\mathrm {K}$ (upper case) and $\kappa$ (lower case). ^[e]
• Kappa statistic [r]: Statistical measure of inter-rater reliability between two observers. ^[e]