Matthijs J Warrens

Associate professor
GION
University of Groningen
m.j.warrens@rug.nl
Curriculum Vitae




Talks
14/06/18 Mogelijkheden en keuzes bij het clusteren van onderwijsdata. ORD Nijmegen PDF
25/05/18 On the negative bias of the Gini coefficient due to grouping. VOC Utrecht PDF
06/10/17 On the Gini coefficient, Cohen's kappa, weighted kappa, ICCs and the SB formula. P&S Groningen
PDF
10/08/17 Understanding external validity indices. IFCS Tokyo
PDF
29/06/17 Modelleren van schoolloopbaan- kansen van leerlingen. ORD Antwerpen
PDF
19/05/17 External validity indices for individual clusters. VOC Leiden
PDF
06/07/15 Correction for chance and maximum value. IFCS Bologna
PDF
24/02/14 Descriptions of Cronbach's alpha. M&S Leiden
PDF
23/09/13 On the abundance of false positives in psychology. M&S Leiden
PDF
25/07/13 Cronbach's alpha as the mean of all split-half reliabilities. IMPS Arnhem
PDF
17/07/13 Pearson's r is a special case of Cohen's weighted kappa. IFCS Tilburg
PDF


Theses
Similarity coefficients for binary data
PhD thesis at LUR

On irrational and transcendental numbers
Bachelor thesis


Links
Webpage RUG
Google scholar profile
ResearchGate profile
Flow-vo project
IFCS Task Force on Benchmarking

Journal articles
    In press
  • Warrens MJ. Similarity measures for 2x2 tables.
    Journal of Intelligent and Fuzzy Systems

  • Warrens MJ. On the negative bias of the Gini coefficient due to grouping. Journal of Classification

  • Warrens MJ, De Raadt A. Properties of Bangdiwala’s B.
    Advances in Data Analysis and Classification
    Journal
  • Wijsman LA, Saab N, Warrens MJ, Van Driel JH, Westenberg PM. Relations of autonomous and controlled motivation with performance in secondary school students’ favoured and disfavoured subjects. Educational Research and Evaluation
    Journal
    2017
  • Warrens MJ. Transforming intraclass correlation coefficients with the Spearman-Brown formula. Journal of Clinical Epidemiology 85:14-16
    Journal
  • Warrens MJ. Symmetric kappa as a function of unweighted kappas. Communications in Statistics - Simulation and Computation 46:5240-5245
    PDF Journal
  • Gower JC, Warrens MJ. Similarity, dissimilarity, and distance, measures of. Wiley StatsRef: Statistics Reference Online
    DOI
  • Warrens MJ. If d is super-metric, then d/(1+d) is super-metric. International Mathematical Forum 12:861-868
    PDF Journal
    2016
  • Warrens MJ. Inequalities between similarities for numerical data. Journal of Classification 33:141-148
    PDF Journal
  • Warrens MJ. Category kappas for agreement between fuzzy classifications. Neurocomputing 194:385-388
    Journal
  • Warrens MJ. A comparison of reliability coefficients for psychometric tests that consist of two parts.
    Advances in Data Analysis and Classification 10:71-84
    PDF Journal
  • Warrens MJ, Bunga C. Pratiwi. Kappa coefficients for circular classifications. Journal of Classification 33:507-522
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  • Warrens MJ. Semigroups of data normalization functions.
    International Mathematical Forum 11:809-815
    PDF Journal
  • Wijsman LA, Warrens MJ, Saab N, Van Driel JH, Westenberg PM. Declining trends in student performance in lower secondary education. European Journal of Psychology of Education 31:595-612
    PDF Journal
    2015
  • Warrens MJ. Relative quantity and allocation disagreement measures for category-level accuracy assessment.
    International Journal of Remote Sensing 36:5959-5969
    Journal
  • Warrens MJ. Five ways to look at Cohen's kappa.
    Journal of Psychology & Psychotherapy 5:197
    PDF Journal
  • Warrens MJ. Properties of the quantity disagreement and the allocation disagreement. International Journal of Remote Sensing 36:1439-1446
    Journal
  • Warrens MJ. Some relationships between Cronbach's alpha and the Spearman-Brown formula. Journal of Classification 32:127-137
    Journal
  • Erdmann TP, De Mast J, Warrens MJ. Some common errors of experimental design, interpretation and inference in agreement studies. Statistical Methods in Medical Research 24:920-935
    Journal
  • Warrens MJ. Additive kappa can be increased by combining adjacent categories. International Mathematical Forum 10:323-328
    PDF Journal
  • Warrens MJ, de Raadt A. Ordering properties of the first eigenvector of certain similarity matrices. Journal of Mathematics. ID 582731
    PDF Journal
  • Warrens MJ. On association measures for continuous variables and correction for chance. Journal of Probability and Statistics. ID 375491
    PDF Journal
    2014
  • Warrens MJ. Corrected Zegers-ten Berge coefficients are special cases of Cohen's weighted kappa. Journal of Classification 31:179-193
    PDF Journal
  • Warrens MJ. Power weighted versions of Bennett, Alpert and Goldstein's S. Journal of Mathematics. ID 231909
    PDF Journal
  • Warrens MJ. On Cronbach's alpha as the mean of all possible k-split alphas. Advances in Statistics. ID 742863
    PDF Journal
  • Warrens MJ. On agreement tables with constant kappa values. Advances in Statistics. ID 853090
    PDF Journal
  • Warrens MJ. New interpretations of Cohen's kappa.
    Journal of Mathematics. ID 203907
    PDF Journal
  • Warrens MJ. On marginal dependencies of the 2x2 kappa.
    Advances in Statistics. ID 759527
    PDF Journal
    2013
  • Warrens MJ. Cohen's weighted kappa with additive weights.
    Advances in Data Analysis and Classification 7:41-55
    PDF Journal
  • Warrens MJ. A comparison of Cohen's kappa and agreement coefficients by Corrado Gini. International Journal of Research and Reviews in Applied Sciences 16:345-351
    PDF Journal
  • Warrens MJ. Conditional inequalities between Cohen's kappa and weighted kappas. Statistical Methodology 10:14-22
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  • Warrens MJ. The Cicchetti-Allison weighting matrix is positive definite. Computational Statistics and Data Analysis 59:180-182
    PDF Journal
  • Warrens MJ. On fixed points of the correction for chance function for 2x2 association coefficients. International Journal of Research and Reviews in Applied Sciences 15:239-247
    PDF Journal
  • Warrens MJ. On association coefficients, correction for chance, and correction for maximum value.
    Journal of Modern Mathematics Frontier 2:111-119
    PDF Journal
  • Warrens MJ. Weighted kappas for 3x3 tables.
    Journal of Probability and Statistics. ID 325831
    PDF Journal
  • Warrens MJ. A comparison of multi-way similarity coefficients for binary sequences. International Journal of Research and Reviews in Applied Sciences 16:64-75
    PDF Journal
    2012
  • Warrens MJ. Some paradoxical results for the quadratically weighted kappa. Psychometrika 77:315-323
    PDF Journal
  • Warrens MJ. Cohen's linearly weighted kappa is a weighted average. Advances in Data Analysis and Classification 6:67-79
    PDF Journal
  • Warrens MJ, Equivalences of weighted kappas for multiple raters. Statistical Methodology 9:407-422
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  • Warrens MJ. The effect of combining categories on Bennett, Alpert and Goldstein's S. Statistical Methodology 9:341-352
    PDF Journal
  • Warrens MJ. A family of multi-rater kappas that can always be increased and decreased by combining categories.
    Statistical Methodology 9:330-340
    PDF Journal
  • Warrens MJ. Cohen's quadratically weighted kappa is higher than linearly weighted kappa for tridiagonal agreement tables.
    Statistical Methodology 9:440-444
    PDF Journal
  • Warrens MJ. On the equivalence of multi-rater kappas based on 2-agreement and 3-agreement with binary scores.
    ISRN Probability and Statistics. ID 656390
    PDF Journal
    2011
  • Warrens MJ. Cohen's kappa is a weighted average.
    Statistical Methodology 8:473-484.
    PDF Journal
  • Warrens MJ. Cohen's linearly weighted kappa is a weighted average of 2x2 kappas. Psychometrika 76:471-486.
    PDF Journal
  • Warrens MJ. Chance-corrected measures for 2x2 tables that coincide with weighted kappa. British Journal of Mathematical and Statistical Psychology 64:355-365.
    PDF Journal
  • Warrens MJ. Weighted kappa is higher than Cohen's kappa for tridiagonal agreement tables. Statistical Methodology 8:268-272.
    PDF Journal
    2010
  • Warrens MJ. A formal proof of a paradox associated with Cohen's kappa. Journal of Classification 27: 322-332.
    PDF Journal
  • Warrens MJ. Inequalities between multi-rater kappas.
    Advances in Data Analysis and Classification 4:271-286.
    PDF Journal
  • Warrens MJ. Cohen's kappa can always be increased and decreased by combining categories. Statistical Methodology 7:673-677.
    PDF Journal
  • Warrens MJ. A Kraemer-type rescaling that transforms the odds ratio into the weighted kappa coefficient. Psychometrika 75:328-330.
    PDF Journal
  • Warrens MJ. Inequalities between kappa and kappa-like statistics for kxk tables. Psychometrika 75:176-185.
    PDF Journal
  • Warrens MJ. n-Way metrics. Journal of Classification 27:173-190.
    PDF Journal
    2009
  • Warrens MJ. k-Adic similarity coefficients for binary (presence/ absence) data. Journal of Classification 26:227-245.
    PDF Journal
  • Warrens MJ. On Robinsonian dissimilarities, the consecutive ones property and latent variable models.
    Advances in Data Analysis and Classification 3:169-184.
    PDF Journal
  • Warrens MJ. A comment on ``The J index as a measure of nominal scale response agreement.''
    Applied Psychological Measurement 33:486-487.
    PDF Journal
  • Warrens MJ, Heiser WJ, Diagnostics for regression dependence in tables re-ordered by the dominant correspondence analysis solution. Computational Statistics and Data Analysis 53:3139-3144.
    PDF Journal
    2008
  • Warrens MJ. On similarity coefficients for 2x2 tables and correction for chance. Psychometrika 73:487-502.
    PDF Journal
  • Warrens MJ. On association coefficients for 2x2 tables and properties that do not depend on the marginal distributions.
    Psychometrika 73:777-789.
    PDF Journal
  • Warrens MJ. On the equivalence of Cohen's kappa and the Hubert-Arabie adjusted Rand index. Journal of Classification 25:177-183.
    PDF Journal
  • Warrens MJ. On the indeterminacy of resemblance measures for binary (presence/absence) data. Journal of Classification 25:125-136.
    PDF Journal
  • Warrens MJ. Bounds of resemblance measures for binary (presence/absence) variables. Journal of Classification 25:195-208.
    PDF Journal
  • Warrens MJ. On multi-way metricity, minimality and diagonal planes. Advances in Data Analysis and Classification 2:109-119.
    PDF Journal
    2005-2007
  • Warrens MJ, De Gruijter DNM, Heiser WJ (2007) A systematic comparison between classical optimal scaling and the two-parameter IRT model. Applied Psychological Measurement 31:106-120
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  • Joekes K, Maes S, Warrens MJ (2007) Predicting quality of life and self-management from dyadic support and overprotection after myocardial infarction. British Journal of Health Psychology 12:473-489
    Journal
  • Colzato LS, Warrens MJ, Hommel B (2006) Priming and binding in and across perception and action: A correlational analysis of the internal structure of event files.
    Quarterly Journal of Experimental Psychology, Part A 59:1785-1804
    Journal
  • Warrens MJ, Heiser WJ, De Gruijter DNM (2005) Reparametrization of homogeneity analysis to accommodate parallel item response functions. Behaviormetrika 32:127-139
    PDF Journal
    Contributions to books
  • Warrens MJ (2015) On Cronbach's alpha as the mean of all split-half reliabilities. In R.E. Millsap et al. (eds.) Quantitative Psychology Research 293-300. Cham: Springer

  • Warrens MJ (2014) Heiser numbers. In M de Rooij, CM van Putten (eds) Psychology and Statistics: Ready for the Future? Liber Amicorum for Willem J Heiser. Leiden: Leiden University
    PDF
  • Heiser WJ, Warrens MJ (2010) Families of relational statistics for 2x2 tables. In H Kaul, HM Mulder (eds) Advances in Interdisciplinary Applied Discrete Mathematics 25-52. Singapore: World Scientific

  • Heiser WJ, Warrens MJ (2008) On the recovery of the consecutive ones property by generalized averaging algorithms. In K Shigemasu, A Okada, T Imaizumi, T Hoshino (eds) New Trends in Psychometrics 107-110. Tokyo: University Academic Press
    PDF
  • Warrens M J (2008) On resemblance measures for binary data and correction for maximum value. In K Shigemasu, A Okada, T Imaizumi, T Hoshino (eds) New Trends in Psychometrics 543-548. Tokyo: University Academic Press
    PDF
  • Warrens MJ, Heiser WJ (2007) Robinson Cubes. In P Brito, P Bertrand, G Cucumel, F de Caravalho (eds) Selected Contributions in Data Analysis and Classification 515-523. Heidelberg: Springer
    PDF
  • Warrens MJ, Heiser WJ (2006). Scaling unidimensional models with multiple correspondence analysis. Chapter 9 in MJ Greenacre, J Blasius (eds) Multiple Correspondence Analysis and Related Methods 219-235. Boca Raton: Chapman and Hall/CRC
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