Hans Friedrich Koehn, Associate Professor

20062019
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Research Output 2006 2019

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Article
2019

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

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
2018
Q-matrix
Identifiability
Completeness
Attribute
Research Personnel

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
2017

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
2016

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

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

Koehn, 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

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

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

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

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
2015

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

Chiu, C. Y. & Koehn, 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 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

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

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
2013

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
2010
Q-matrix
Matrix Decomposition
Individual Differences
Proximity
Decompose

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

Koehn, 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
2009

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

Exemplar-based clustering via simulated annealing

Brusco, M. J. & Koehn, 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
2008

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

Brusco, M. J., Koehn, 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

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

Brusco, M. J. & Koehn, 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
2006

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