Hans Friedrich Koehn, Associate Professor

20062019
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Research Output 2006 2019

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

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

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
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

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

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

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

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

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

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

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

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

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

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

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

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
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 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

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