Cohen's weighted kappa with additive weights

MJ Warrens - Advances in Data Analysis and Classification, 2013 - Springer
Cohen's weighted kappa is a popular descriptive statistic for summarizing interrater
agreement on an ordinal scale. An agreement table with n ∈\mathbb N _ ≥ 3 ordered …

Cohen's linearly weighted kappa is a weighted average

MJ Warrens - Advances in Data Analysis and Classification, 2012 - Springer
An n× n agreement table F= f ij with n≥ 3 ordered categories can for fixed m (2≤ m≤ n− 1)
be collapsed into n-1 m-1 distinct m× m tables by combining adjacent categories. It is shown …

Cohen's linearly weighted kappa is a weighted average of 2× 2 kappas

MJ Warrens - Psychometrika, 2011 - Springer
An agreement table with n∈ ℕ≥ 3 ordered categories can be collapsed into n− 1 distinct 2×
2 tables by combining adjacent categories. Vanbelle and Albert (Stat. Methodol. 6: 157–163 …

A note on Cohen's weighted kappa coefficient of agreement with linear weights

PW Mielke Jr, KJ Berry - Statistical Methodology, 2009 - Elsevier
Vanbelle and Albert [S. Vanbelle, A. Albert, A note on the linearly weighted kappa coefficient
for ordinal scales, Statistical Methodology 6 (2008) 157–163] showed that the observed and …

Weighted kappas for 3× 3 tables

MJ Warrens - Journal of Probability and Statistics, 2013 - Wiley Online Library
Weighted kappa is a widely used statistic for summarizing inter‐rater agreement on a
categorical scale. For rating scales with three categories, there are seven versions of …

Equivalences of weighted kappas for multiple raters

MJ Warrens - Statistical Methodology, 2012 - Elsevier
Cohen's unweighted kappa and weighted kappa are popular descriptive statistics for
measuring agreement between two raters on a categorical scale. With m≥ 3 raters, there …

Cohen's kappa is a weighted average

MJ Warrens - Statistical Methodology, 2011 - Elsevier
The κ coefficient is a popular descriptive statistic for summarizing an agreement table. It is
sometimes desirable to combine some of the categories, for example, when categories are …

Some paradoxical results for the quadratically weighted kappa

MJ Warrens - Psychometrika, 2012 - Springer
The quadratically weighted kappa is the most commonly used weighted kappa statistic for
summarizing interrater agreement on an ordinal scale. The paper presents several …

A family of multi-rater kappas that can always be increased and decreased by combining categories

MJ Warrens - Statistical Methodology, 2012 - Elsevier
Cohen's kappa is a popular descriptive statistic for measuring agreement between two raters
on a nominal scale. Various authors have generalized Cohen's kappa to the case of m≥ 2 …

Cohen's quadratically weighted kappa is higher than linearly weighted kappa for tridiagonal agreement tables

MJ Warrens - Statistical Methodology, 2012 - Elsevier
Cohen's weighted kappa is a popular descriptive statistic for measuring the agreement
between two raters on an ordinal scale. Popular weights for weighted kappa are the linear …