Hans Friedrich Koehn, Associate Professor

20062019
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Research Output 2006 2019

Article

A general proof of consistency of heuristic classification for cognitive diagnosis models

Chiu, C. Y. & Köhn, H. F., Nov 1 2015, In : British Journal of Mathematical and Statistical Psychology. 68, 3, p. 387-409 23 p.

Research output: Contribution to journalArticle

Heuristics
Model
Regularity Conditions
Statistical property
Assignment

An evaluation of exact methods for the multiple subset maximum cardinality selection problem

Brusco, M. J., Köhn, H. F. & Steinley, D., May 1 2016, In : British Journal of Mathematical and Statistical Psychology. 69, 2, p. 194-213 20 p.

Research output: Contribution to journalArticle

Exact Method
Cardinality
Subset
Evaluation
Food

An Exact Method for Partitioning Dichotomous Items Within the Framework of the Monotone Homogeneity Model

Brusco, M. J., Koehn, H. F. & Steinley, D., Dec 1 2015, In : Psychometrika. 80, 4, p. 949-967 19 p.

Research output: Contribution to journalArticle

Exact Method
Homogeneity
Partitioning
Monotone
Mathematical programming

A Procedure for Assessing the Completeness of the Q-Matrices of Cognitively Diagnostic Tests

Koehn, H. F. & Chiu, C. Y., Mar 1 2017, In : Psychometrika. 82, 1, p. 112-132 21 p.

Research output: Contribution to journalArticle

Q-matrix
Diagnostic Tests
Routine Diagnostic Tests
Completeness
Complications

A Proof of the Duality of the DINA Model and the DINO Model

Köhn, H. F. & Chiu, C. Y., Jul 1 2016, In : Journal of Classification. 33, 2, p. 171-184 14 p.

Research output: Contribution to journalArticle

Duality
Educational Measurement
Output
Model
Parameterization
Q-matrix
Identifiability
Completeness
Attribute
Research Personnel

Clustering qualitative data based on binary equivalence relations: Neighborhood search heuristics for the clique partitioning problem

Brusco, M. J. & Köhn, H. F., Dec 1 2009, In : Psychometrika. 74, 4, p. 685-703 19 p.

Research output: Contribution to journalArticle

Neighborhood Search
Binary relation
Equivalence relation
Clique
Cluster Analysis

Combinatorial individual differences scaling within the city-block metric

Koehn, H. F., Nov 15 2006, In : Computational Statistics and Data Analysis. 51, 2, p. 931-946 16 p.

Research output: Contribution to journalArticle

Individual Differences
Combinatorial optimization
Schematic diagrams
Scaling
Metric

Consistency of Cluster Analysis for Cognitive Diagnosis: The DINO Model and the DINA Model Revisited

Chiu, C. Y. & Koehn, H. F., Sep 8 2015, In : Applied Psychological Measurement. 39, 6, p. 465-479 15 p.

Research output: Contribution to journalArticle

cluster analysis
Cluster Analysis
diagnostic

Consistency of Cluster Analysis for Cognitive Diagnosis: The Reduced Reparameterized Unified Model and the General Diagnostic Model

Chiu, C. Y. & Koehn, H. F., Sep 1 2016, In : Psychometrika. 81, 3, p. 585-610 26 p.

Research output: Contribution to journalArticle

Model Diagnostics
Cluster analysis
Cluster Analysis
Clustering Methods
Proposition

Consistency Theory for the General Nonparametric Classification Method

Chiu, C. Y. & Koehn, H. F., Sep 15 2019, In : Psychometrika. 84, 3, p. 830-845 16 p.

Research output: Contribution to journalArticle

Diagnostics
Estimator
Increasing Functions
Statistical Models
Parametric Model

Exact and approximate methods for a one-dimensional minimax bin-packing problem

Brusco, M. J., Koehn, H. F. & Steinley, D., Jul 1 2013, In : Annals of Operations Research. 206, 1, p. 611-626 16 p.

Research output: Contribution to journalArticle

Bin packing
Minimax
Integer linear programming
Assignment
Discrimination

Exemplar-based clustering via simulated annealing

Brusco, M. J. & Köhn, H. F., Sep 2009, In : Psychometrika. 74, 3, p. 457-475 19 p.

Research output: Contribution to journalArticle

P-median
P-median Problem
Simulated annealing
Simulated Annealing
Cluster Analysis

Fitting the Reduced RUM with Mplus: A Tutorial

Chiu, C. Y., Koehn, H. F. & Wu, H. M., Oct 1 2016, In : International Journal of Testing. 16, 4, p. 331-351 21 p.

Research output: Contribution to journalArticle

Educational Measurement
Expectation-maximization Algorithm
Software
Logistic Models
Research Personnel

Heuristic cognitive diagnosis when the Q-matrix is unknown

Koehn, H. F., Chiu, C. Y. & Brusco, M. J., May 1 2015, In : British Journal of Mathematical and Statistical Psychology. 68, 2, p. 268-291 24 p.

Research output: Contribution to journalArticle

Q-matrix
Heuristics
Unknown
Attribute
Educational Models

Heuristic implementation of dynamic programming for matrix permutation problems in combinatorial data analysis

Brusco, M. J., Köhn, H. F. & Stahl, S., Sep 1 2008, In : Psychometrika. 73, 3, p. 503-522 20 p.

Research output: Contribution to journalArticle

Combinatorial Data Analysis
Permutation Matrix
Dynamic programming
Dynamic Programming
Heuristics

How to Build a Complete Q-Matrix for a Cognitively Diagnostic Test

Koehn, H. F. & Chiu, C. Y., Jul 1 2018, In : Journal of Classification. 35, 2, p. 273-299 27 p.

Research output: Contribution to journalArticle

Q-matrix
Diagnostic Tests
Routine Diagnostic Tests
diagnostic
Research Personnel

Joint Maximum Likelihood Estimation for Diagnostic Classification Models

Chiu, C. Y., Koehn, H. F., Zheng, Y. & Henson, R., Dec 1 2016, In : Psychometrika. 81, 4, p. 1069-1092 24 p.

Research output: Contribution to journalArticle

Maximum likelihood estimation
Maximum Likelihood Estimation
Diagnostics
Joints
Estimator

Optimal partitioning of a data set based on the p-median model

Brusco, M. J. & Köhn, H. F., Mar 1 2008, In : Psychometrika. 73, 1, p. 89-105 17 p.

Research output: Contribution to journalArticle

P-median
Cluster Analysis
Partitioning
Telecommunications
Telecommunication industry
Q-matrix
Matrix Decomposition
Individual Differences
Proximity
Decompose

Residual analysis for unidimensional scaling in the L2-norm

Brusco, M. J., Steinley, D. & Koehn, H. F., Aug 9 2019, In : Communications in Statistics: Simulation and Computation. 48, 7, p. 2210-2221 12 p.

Research output: Contribution to journalArticle

Residual Analysis
Scaling
Norm
Dissimilarity
Voting

The p-Median Model as a Tool for Clustering Psychological Data

Köhn, H. F., Steinley, D. & Brusco, M. J., Mar 2010, In : Psychological Methods. 15, 1, p. 87-95 9 p.

Research output: Contribution to journalArticle

Cluster Analysis
Psychology
Software
Behavioral Sciences
Social Sciences

The Reduced RUM as a Logit Model: Parameterization and Constraints

Chiu, C. Y. & Koehn, H. F., Jun 1 2016, In : Psychometrika. 81, 2, p. 350-370 21 p.

Research output: Contribution to journalArticle

Markov Chains
Logit Model
Parameterization
Logistic Models
Educational Measurement
Chapter

Exploring joint maximum likelihood estimation for cognitive diagnosis models

Chiu, C. Y., Koehn, H. F., Zheng, Y. & Henson, R., Aug 8 2015, Quantitative Psychology Research: The 79th Annual Meeting of the Psychometric Society, Madison, Wisconsin, 2014. Springer International Publishing, Vol. 140. p. 263-277 15 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Joints
Markov Chains
class membership
Educational Models
reputation

Order-Constrained Proximity Matrix Representations: Ultrametric Generalizations and Constructions with MATLAB

Hubert, L., Köhn, H. F. & Steinley, D., Mar 18 2010, Statistics in the Social Sciences: Current Methodological Developments. John Wiley and Sons, p. 81-112 32 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Graphical Representation
Matrix Representation
Proximity
MATLAB
Generalization
Comment/debate

Comment on "clustering by passing messages between data points"

Brusco, M. J. & Köhn, H. F., Feb 8 2008, In : Science. 319, 5864, p. 726c

Research output: Contribution to journalComment/debate

Cluster Analysis
Heuristics

Erratum to: Exemplar-Based Clustering via Simulated Annealing (Psychometrika, (2009), 74, 457-475, DOI 10.1007/s11336-009-9115-2)

Brusco, M. J. & Köhn, H. F., Dec 1 2009, In : Psychometrika. 74, 4, p. 755 1 p.

Research output: Contribution to journalComment/debate

Simulated annealing
Simulated Annealing
Cluster Analysis
Clustering
Conference contribution

Additive Trees for Fitting Three-Way (Multiple Source) Proximity Data

Koehn, H. F. & Kern, J. L., Jan 1 2019, Quantitative Psychology - 83rd Annual Meeting of the Psychometric Society, 2018. Wiberg, M., Culpepper, S., Janssen, R., González, J. & Molenaar, D. (eds.). Springer New York LLC, p. 403-413 11 p. (Springer Proceedings in Mathematics and Statistics; vol. 265).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Proximity
Penalty
Square Functions
Individual Differences
Projection Algorithm

Conditions of completeness of the Q-matrix of tests for cognitive diagnosis

Koehn, H. F. & Chiu, C. Y., Jan 1 2016, Quantitative Psychology Research - The 80th Annual Meeting of the Psychometric Society. Wang, W-C., Douglas, J. A., Wiberg, M., van der Ark, L. A. & Bolt, D. M. (eds.). Springer New York LLC, p. 255-264 10 p. (Springer Proceedings in Mathematics and Statistics; vol. 167).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Q-matrix
Completeness
Diagnostic Tests
Complications
Diagnostics

Exploring joint maximum likelihood estimation for cognitive diagnosis models

Chiu, C. Y., Koehn, H. F., Zheng, Y. & Henson, R., Jan 1 2015, Quantitative Psychology Research - The 79th Annual Meeting of the Psychometric Society, 2014. van der Ark, L. A., Wang, W-C., Douglas, J. A., Bolt, D. M. & Chow, S-M. (eds.). Springer New York LLC, p. 263-277 15 p. (Springer Proceedings in Mathematics and Statistics; vol. 140).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Maximum Likelihood Estimation
Expectation Maximization
Markov Chain Monte Carlo
CPU Time
Estimation Algorithms

Identifiability of the latent attribute space and conditions of Q-matrix completeness for attribute hierarchy models

Koehn, H. F. & Chiu, C. Y., Jan 1 2018, Quantitative Psychology - The 82nd Annual Meeting of the Psychometric Society, Zurich, Switzerland, 2017. Gonzalez, J., Janssen, R., Wiberg, M., Molenaar, D. & Culpepper, S. (eds.). Springer New York LLC, p. 363-375 13 p. (Springer Proceedings in Mathematics and Statistics; vol. 233).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Q-matrix
Identifiability
Completeness
Attribute
Model

Parameter constraints of the logit form of the reduced RUM

Koehn, H. F., Jan 1 2017, Quantitative Psychology - 81st Annual Meeting of the Psychometric Society, 2016. Wang, W-C., Wiberg, M., Culpepper, S. A., Douglas, J. A. & van der Ark, L. A. (eds.). Springer New York LLC, p. 207-213 7 p. (Springer Proceedings in Mathematics and Statistics; vol. 196).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Logit
Latent Class Analysis
Logit Model
Expectation-maximization Algorithm
Expectation Maximization

The comparison of two input statistics for heuristic cognitive diagnosis

Koehn, H. F., Chiu, C. Y. & Brusco, M. J., Jan 1 2013, New Developments in Quantitative Psychology - Presentations from the 77th Annual Psychometric Society Meeting. van der Ark, L. A., Millsap, R. E., Bolt, D. M. & Woods, C. M. (eds.). Springer New York LLC, p. 335-343 9 p. (Springer Proceedings in Mathematics and Statistics; vol. 66).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Attribute
Heuristics
Statistics
Performance Test
Nonparametric Model
Review article

A review of multiobjective programming and its application in quantitative psychology

Koehn, H. F., Oct 1 2011, In : Journal of Mathematical Psychology. 55, 5, p. 386-396 11 p.

Research output: Contribution to journalReview article

Multiobjective Programming
Research Personnel
Psychology
Multiple Objectives
Optimization Problem