Publications and Selected Talks
Publications
2016–2014
Ünlü, A., & Schrepp, M. (in press). Toward a principled sampling theory for quasi-orders. Frontiers in Quantitative Psychology and Measurement.
Ünlü, A. (2016). Adjusting potentially confounded scoring protocols for motivation aggregation in organismic integration theory: An exemplification with the relative autonomy or self-determination index. Frontiers in Educational Psychology, 7, 272, 1–4.
Ünlü, A., & Schurig, M. (2016). Computational typologies of multidimensional end-of-primary-school performance profiles from an educational perspective of large-scale TIMSS and PIRLS surveys. Current Issues in Comparative Education, 18, 6–25. (Special Issue on Innovative Methods in Comparative and International Education, Teachers College, Columbia University.)
Ünlü, A., & Dettweiler, U. (2015). Motivation internalization and simplex structure in self-determination theory. Psychological Reports, 117, 675–691.
Ünlü, A., & Schrepp, M. (in press). Techniques for sampling quasi-orders. Archives of Data Science.
Pauly, M., Umlauft, M., & Ünlü, A. (2016). Resampling-based inference methods for comparing two coefficient alpha. ArXiv e-prints, arXiv:1602.03727.
Ünlü, A., & Schrepp, M. (2015). Untangling comparison bias in inductive item tree analysis based on representative random quasi-orders. Mathematical Social Sciences, 76, 31–43.
Ünlü, A., & Schrepp, M. (in press). Biasing effects of non-representative samples of quasi-orders in the assessment of recovery quality of IITA-type item hierarchy mining. In A. Wilhelm (Ed.), Analysis of Large and Complex Data. Studies in Classification, Data Analysis, and Knowledge Organization. Heidelberg: Springer.
Ünlü, A., & Gschrey, B. (2015). Interactive graphics for presentation and exploration of student performance profiles in IGLU/TIMSS 2011 educational surveys. Open Journal of Social Sciences, 3, 122–136.
Ünlü, A., Kasper, D., Trendtel, M., & Schurig, M. (2014). The OECD's Programme for International Student Assessment (PISA) study: A review of its basic psychometric concepts. In M. Spiliopoulou, L. Schmidt-Thieme, & R. Janning (Eds.), Data Analysis, Machine Learning and Knowledge Discovery (pp. 417–425). Heidelberg: Springer.
Dettweiler, U., Ünlü, A., Lauterbach, G., Becker, C., & Gschrey, B. (2015). Investigating the motivational behavior of pupils during outdoor science teaching within self-determination theory. Frontiers in Educational Psychology, 6, 125, 1–16.
Dettweiler, U., Ünlü, A., Lauterbach, G., Legl, A., Perikles, S., & Kugelmann, C. (2015). Alien at home: Adjustment strategies of students returning from a six-months over-sea’s educational programme. International Journal of Intercultural Relations, 44, 72–87.
Schrepp, M., & Ünlü, A. (2015). On the creation of representative samples of random quasi-orders. Frontiers in Quantitative Psychology and Measurement, 6, 1791, 1–8.
Gschrey, B., & Ünlü, A. (in press). Correlated component regression: Profiling student performances by means of background characteristics. In A. Wilhelm (Ed.), Analysis of Large and Complex Data. Studies in Classification, Data Analysis, and Knowledge Organization. Heidelberg: Springer.
George, A., Robitzsch, A., Kiefer, T., Groß, J., & Ünlü, A. (in press). The R package CDM for cognitive diagnosis modeling. Journal of Statistical Software.
Gschrey, B., & Ünlü, A. (2014). Review of T. Raykov & G.A. Marcoulides. Introduction to Psychometric Theory. Routledge, New York, 2010. Psychometrika, 79, 538–539.
Kasper, D., & Ünlü, A. (2015). Eigenwertzerlegung [Singular value decomposition], Logarithmus. In R. Diaz-Bone & C. Weischer (Eds.), Methoden-Lexikon für die Sozialwissenschaften [Encyclopedia of Methods for the Social Sciences]. Wiesbaden: Springer VS Verlag für Sozialwissenschaften.
Kasper, D., Ünlü, A. & Gschrey, B. (2014). Sensitivity analyses for the mixed coefficients multinomial logit model. In M. Spiliopoulou, L. Schmidt-Thieme, & R. Janning (Eds.), Data Analysis, Machine Learning and Knowledge Discovery (pp. 389–396). Heidelberg: Springer.
Trendtel, M., & Ünlü, A. (2015). Benfords Law, Interpolation. In R. Diaz-Bone & C. Weischer (Eds.), Methoden-Lexikon für die Sozialwissenschaften [Encyclopedia of Methods for the Social Sciences]. Wiesbaden: Springer VS Verlag für Sozialwissenschaften.
Trendtel, M., Ünlü, A., Kasper, D., & Stubben, S. (2014). Using latent class models with random effects for investigating local dependence. In M. Spiliopoulou, L. Schmidt-Thieme, & R. Janning (Eds.), Data Analysis, Machine Learning and Knowledge Discovery (pp. 407–416). Heidelberg: Springer.
Ünlü, A. (2015). Diagonalmatrix, Eigenvektor, Eigenwert, Einheitsmatrix, Fakultät, Gesetz der großen Zahlen [Law of large numbers], Hauptdiagonale, Inverse einer Matrix, Isomorphismus, Matrix, Transponierte einer Matrix, Matrixalgebra, Matrixmultiplikation, Mengenlehre [Set theory], Transformation, Vektor. In R. Diaz-Bone & C. Weischer (Eds.), Methoden-Lexikon für die Sozialwissenschaften [Encyclopedia of Methods for the Social Sciences]. Wiesbaden: Springer VS Verlag für Sozialwissenschaften.
2013–2012
Albert, D., Wesiak, G., & Ünlü, A. (2013). Heuristics for generating and validating surmise relations across, between and within sets. In J.-Cl. Falmagne, D. Albert, C. Doble, D. Eppstein, & X. Hu (Eds.), Knowledge Spaces: Applications in Education (pp. 193–227). Berlin, Heidelberg: Springer.
Bos, W., Wendt, H., Ünlü, A., Valtin, R., Euen, B., Kasper, D., & Tarelli, I. (2012). Leistungsprofile von Viertklässlerinnen und Viertklässlern in Deutschland [Proficiency profiles of fourth grade students in Germany]. In W. Bos, I. Tarelli, A. Bremerich-Vos, & K. Schwippert (Eds.), IGLU 2011. Lesekompetenzen von Grundschulkindern in Deutschland im internationalen Vergleich [IGLU 2011. International Comparison of Reading Competencies of Primary School Children in Germany] (pp. 227–259). Münster: Waxmann.
Bos, W., Wendt, H., Ünlü, A., Valtin, R., Euen, B., Kasper, D. & Tarelli, I. (2012). Leistungsprofile von Viertklässlerinnen und Viertklässlern in Deutschland [Proficiency profiles of fourth grade students in Germany]. In W. Bos, H. Wendt, O. Köller, & C. Selter (Eds.), TIMSS 2011. Mathematische und naturwissenschaftliche Kompetenzen von Grundschulkindern in Deutschland im internationalen Vergleich [TIMSS 2011. International Comparison of Mathematics and Science Competencies of Primary School Children in Germany] (pp. 269–301). Münster: Waxmann.
Heller, J., Ünlü, A., & Albert, D. (2013). Skills, competencies and knowledge structures. In J.-Cl. Falmagne, D. Albert, C. Doble, D. Eppstein, & X. Hu (Eds.), Knowledge Spaces: Applications in Education (pp. 229–242). Berlin, Heidelberg: Springer.
Kasper, D., & Ünlü, A. (2013). On the relevance of assumptions associated with classical factor analytic approaches. Frontiers in Quantitative Psychology and Measurement, 4, 109, 1–20.
Trendtel, M., & Ünlü, A. (2013). Convex optimization as a tool for correcting dissimilarity matrices for regular minimality. In B. Lausen, D. van den Poel, & A. Ultsch (Eds.), Algorithms from and for Nature and Life: Classification and Data Analysis (pp. 165–174). Heidelberg: Springer.
Ünlü, A., Sargin, A., & Viehrig, M. (2013). Mosaics for visualizing knowledge structures. Journal of Data Science, 11, 451–478.
Ünlü, A., Schrepp, M., Heller, J., Hockemeyer, C., Wesiak, G., & Albert, D. (2013). Recent developments in performance-based knowledge space theory. In J.-Cl. Falmagne, D. Albert, C. Doble, D. Eppstein, & X. Hu (Eds.), Knowledge Spaces: Applications in Education (pp. 147–192). Berlin, Heidelberg: Springer.
2011
Dzhafarov, E.N., Ünlü, A., Trendtel, M., & Colonius, H. (2011). Matrices with a given number of violations of regular minimality. Journal of Mathematical Psychology, 55, 240–250.
George, A.C., & Ünlü, A. (2011). Parameter estimation in skills-based knowledge space theory and cognitive diagnosis models: A comparison. In D. Conesa, A. Forte, A. López-Quílez, & F. Muñoz (Eds.), Proceedings of the International Workshop on Statistical Modelling (pp. 258–262). Valencia, Spain.
Malik, W.A., & Ünlü, A. (2011). Interactive graphics: Exemplified with real data applications. Frontiers in Quantitative Psychology and Measurement, 2, 11, 1–12.
Ünlü, A. (2011). A note on the connection between knowledge structures and latent class models. Methodology: European Journal of Research Methods for the Behavioral and Social Sciences, 7, 63–67.
Ünlü, A., & Kiefer, T. (2011). Review of A.A. Rupp, J. Templin, & R.A. Henson. Diagnostic Measurement: Theory, Methods, and Applications. The Guilford Press, New York, 2010. Psychometrika, 76, 715–716.
Ünlü, A., & Malik, W.A. (2011). Interactive glyph graphics of multivariate data in psychometrics: The software package Gauguin. Methodology: European Journal of Research Methods for the Behavioral and Social Sciences, 7, 134–144.
Ünlü, A., & Sargin, A. (2011). Mosaic displays for combinatorial psychometric models. In P. Cerchiello & C. Tarantola (Eds.), Proceedings of the Classification and Data Analysis Group of the Italian Statistical Society. Pavia, Italy: Pavia University Press.
Ünlü, A., & Yanagida, T. (2011). R you ready for R?: The CRAN Psychometrics Task View. British Journal of Mathematical and Statistical Psychology, 64, 182–186.
2010
Kiefer, T., & Ünlü, A. (2010). Fechnerian scaling of IRT models for dichotomous data. In A. Bastianelli & G. Vidotto (Eds.), Fechner Day 2010 (pp. 57–62). Padua, Italy: The International Society for Psychophysics.
Kiefer, T., Ünlü, A., & Dzhafarov, E.N. (2010). The R package fechner for Fechnerian scaling. In H. Locarek-Junge & C. Weihs (Eds.), Studies in Classification, Data Analysis, and Knowledge Organization (pp. 315–322). Berlin: Springer.
Sargin, A., & Ünlü, A. (2010). The R package DAKS: Basic functions and complex algorithms in knowledge space theory. In H. Locarek-Junge & C. Weihs (Eds.), Studies in Classification, Data Analysis, and Knowledge Organization (pp. 263–270). Berlin: Springer.
Trendtel, M., Ünlü, A., & Dzhafarov, E.N. (2010). With what probability regular minimality can be satisfied by chance? In A. Bastianelli & G. Vidotto (Eds.), Fechner Day 2010 (pp. 63–68). Padua, Italy: The International Society for Psychophysics.
Trendtel, M., Ünlü, A., & Dzhafarov, E.N. (2010). Matrices satisfying regular minimality. Frontiers in Quantitative Psychology and Measurement, 1, 211, 1–6.
Ünlü, A., & Sargin, A. (2010). DAKS: An R package for data analysis methods in knowledge space theory. Journal of Statistical Software, 37(2), 1–31. URL www.jstatsoft.org/v37/i02/.
Ünlü, A., & Trendtel, M. (2010). Testing for regular minimality. In A. Bastianelli & G. Vidotto (Eds.), Fechner Day 2010 (pp. 51–56). Padua, Italy: The International Society for Psychophysics.
2009
Sargin, A., & Ünlü, A. (2009). Inductive item tree analysis: Corrections, improvements, and comparisons. Mathematical Social Sciences, 58, 376–392.
Sargin, A., & Ünlü, A. (2009). Visualizing quantitative data. In L. Liu & M.T. Özsu (Eds.), Encyclopedia of Database Systems (pp. 3437–3438). New York: Springer.
Ünlü, A. (2009). Statistical and Probabilistic Contributions to the Theory of Knowledge Spaces. Habilitation thesis. University of Augsburg, Germany.
Ünlü, A. (2009). The Correlational Agreement Coefficient CA and an Alternative kappa. Göttingen: Cuvillier Verlag.
Ünlü, A., Kiefer, T., & Dzhafarov, E.N. (2009). Fechnerian scaling in R: The package fechner. Journal of Statistical Software, 31(6), 1–24. URL www.jstatsoft.org/v31/i06/.
Ünlü, A., & Sargin, A. (2009). Interactive visualization of assessment data: The software package Mondrian. Applied Psychological Measurement, 33, 148–156.
Ünlü, A., & Sargin, A. (2009). Visualizing categorical data. In L. Liu & M.T. Özsu (Eds.), Encyclopedia of Database Systems (pp. 3416–3417). New York: Springer.
2008
Malik, W.A., & Ünlü, A. (2008). Improved efficient mean estimation in incomplete data using auxiliary information. In P. Brito (Ed.), Proceedings in Computational Statistics. Heidelberg, Germany: Physica/Springer.
Sargin, A., Ünlü, A., & Unwin, A.R. (2008). Matrix visualization for Rasch analysis. In P. Brito (Ed.), Proceedings in Computational Statistics. Heidelberg, Germany: Physica/Springer.
Ünlü, A. (2008). A note on monotone likelihood ratio of the total score variable in unidimensional item response theory. British Journal of Mathematical and Statistical Psychology, 61, 179–187.
Ünlü, A., & Kickmeier-Rust, M.D. (2008). Implementation and applications of a three-round user strategy for improved principal axis minimization. Journal of Applied Quantitative Methods, 3(1), 44–63.
Ünlü, A., & Malik, W.A. (2008). Psychometric data analysis: A size/fit trade-off evaluation procedure for knowledge structures. Journal of Data Science, 6, 491–514.
Ünlü, A., & Malik, W.A. (2008). Modified item tree analysis of inductive reasoning data. Journal of Interdisciplinary Mathematics, 11, 641–652.
2007–2004
Ünlü, A. (2005). Analysis of multinomial response data: A measure for evaluating knowledge structures. In J. Janssen & P. Lenca (Eds.), Applied Stochastic Models and Data Analysis (pp. 296–304). Brest, France: ENST Bretagne.
Ünlü, A. (2006). Estimation of careless error and lucky guess probabilities for dichotomous test items: A psychometric application of a biometric latent class model with random effects. Journal of Mathematical Psychology, 50, 309–328.
Ünlü, A. (2007). Nonparametric item response theory axioms and properties under nonlinearity and their exemplification with knowledge space theory. Journal of Mathematical Psychology, 51, 383–400.
Ünlü, A. (2007). Misclassified response data in psychometrics. In H.P. Wolf, G. Kauermann, K. Mosler, & A. Ziegler (Eds.), Statistics 2007 – Statistics Under One Umbrella (p. 317). Bielefeld, Germany: Druckerei Tiemann.
Ünlü, A., & Albert, D. (2004). The Correlational Agreement Coefficient CA - a mathematical analysis of a descriptive goodness-of-fit measure. Mathematical Social Sciences, 48, 281–314.
Ünlü, A., Brandt, S., & Albert, D. (2007). Corrigendum to ''Surmise relations between tests - mathematical considerations''. Discrete Applied Mathematics, 155, 2401–2402.
Ünlü, A., Brandt, S., & Albert, D. (2007). Test surmise relations, test knowledge structures, and their characterizations. Preprint No. 035/2007, Institute of Mathematics, University of Augsburg.
Ünlü, A., & Kickmeier-Rust, M.D. (2005). EPM: A strategy for principal axis minimization. In E.A. Lipitakis (Ed.), Hellenic European Research on Computer Mathematics and its Applications. Athens, Greece: Lea Publishers.
Ünlü, A., & Kickmeier-Rust, M.D. (2006). Prediction of solvability dependencies between dichotomous test items: A local order-theoretic measure of association. In A. Rizzi & M. Vichi (Eds.), Proceedings in Computational Statistics (pp. 631–638). Heidelberg, Germany: Physica/Springer.
Selected Talks
2016–2014
Ünlü, A. (2016, March). Wissens- und Kompetenzmodellierung durch Lernraumtheorie [Knowledge and competence modeling based on learning space theory]. Talk in the Symposium: Neuartige methodisch-statistische Verfahrensweisen der Kompetenzmodellierung und komplexe Prognosemodelle in der Empirischen Bildungsforschung [New methodic-statistical approaches to competence modeling and advanced prediction models in empirical educational research] at the Society for Empirical Educational Research (GEBF) 2016 Conference, Freie Universität Berlin, Berlin, Germany.
Ünlü, A. (2015, January). PISA Abhängigkeitsstrukturen [PISA dependence structures]. Invited talk at the Hector-Institut für Empirische Bildungsforschung, University of Tübingen, Tübingen, Germany.
Ünlü, A. (2015, January). Toward learning space large-scale assessment: A computational perspective. Invited talk at the Ulmer Mathematisches Kolloquium, Ulm University, Ulm, Germany.
Ünlü, A. (2015, November). Educational test mastery hierarchy mining. Invited talk at the Karlsruher Institut für Technologie (KIT), Karlsruhe, Germany.
Ünlü, A. (2015, March). Latent class analysis. Invited talk for a methods workshop at the Society for Empirical Educational Research (GEBF) 2015 Conference, Ruhr-Universität Bochum, Bochum, Germany.
Ünlü, A. (2015, March). Ein methodisch-heterogener Rundblick über statistische Measurementforschung zu PISA im Zentrum für internationale Bildungsvergleichsstudien (ZIB) [A methodically heterogeneous overview about statistical measurement research on PISA in the Centre for International Student Assessment (ZIB)]. Talk in the F. Goldhammer, O. Lüdtke, & A. Ünlü (2015, March). Symposium: Methodische Herausforderungen bei der Durchführung und Auswertung von Large-Scale Assessment Studien [Symposium: Methodical challenges in the implementation and evaluation of large-scale assessment studies] at the Gesellschaft für Empirische Bildungsforschung (GEBF) 2015 Conference, Ruhr-Universität Bochum, Bochum, Germany.
Ünlü, A. (2015, June). R introduction to item response theory: From classical test to latent trait theory. Invited talk at the HBSC Methodological Training Workshop 2015 - Health Behaviour among School-aged Children Study, a WHO Collaborative Study, Sofia, Bulgaria.
Ünlü, A. (2015, December). Wissensabhängigkeitsstrukturen und Motivationsinternalisierungsmaße [Knowledge dependence structures and motivation internalization measures]. Invited talk at the Institute of Psychology and Education, Ulm University, Ulm, Germany.
Ünlü, A. (2015, December). Einführung in Strukturgleichungsmodelle: Exemplifiziert anhand von R-Paket lavaan [Introduction to structural equation models: Exemplified using the R-package lavaan]. Invited talk at the Institute of Psychology and Education, Ulm University, Ulm, Germany.
Dettweiler, U., Lauterbach, G., Becker, C., & Ünlü, A. (2015, June–July). Research expeditions as a tool for environmental education: Results from a pilot study searching into the motivational behavior of pupils within the Self Determination Theory. Poster at the World Environmental Education Congress (WEEC 2015), Gothenburg, Sweden.
Dettweiler, U., & Ünlü, A. (2015, August). Testing the reliability and validity of a reduced Academic Self-Regulation Questionnaire (SRQ-A) in a mixed-methods approach. Poster at the Eighth SELF Biennial International Conference, Kiel, Germany.
Ünlü, A., & Schrepp, M. (2015, September). Techniques for sampling quasi-orders. Talk at the European Conference on Data Analysis (ECDA), Colchester, UK.
Dettweiler, U., Becker, C., Lauterbach, G., Klaperski, S., & Ünlü, A. (2014, May). Zusammenhang der Bewegungsaktivität und der Lernmotivation bei Jungen und Mädchen während eines "Expeditionary Teaching" Projekts [Relationship of movement activity and learning motivation for boys and girls during an "Expeditionary Teaching" project]. Poster at the Annual Meeting of the Arbeitsgemeinschaft Sportpsychologie "Performing under Pressure", Munich, Germany.
Dettweiler, U., Ünlü, A., Becker, C., & Lauterbach, G. (2014, November). Teaching science in an alpine setting. Understanding some core factors influencing pupils' motivational behaviour. Talk at the International Mountain and Outdoor Sports Conference, Prague, Czech Republic.
Gschrey, B., & Ünlü, A. (2014, July). Correlated component regression: Profiling student performances by means of background characteristics. Talk at the European Conference on Data Analysis (ECDA), Bremen, Germany.
Liu, X., & Ünlü, A. (2014, July). Multivariate logistic mixtures. Talk at the European Conference on Data Analysis (ECDA), Bremen, Germany.
Ünlü, A. (2014, September). Computational test structuring. Invited talk at the Dresden Summerschool on Methodology of Task Design, Dresden, Germany.
Ünlü, A. (2014, September). A case study Latent GOLD tutorial on latent class cluster analysis. Invited talk at the Dresden Summerschool on Methodology of Task Design, Dresden, Germany.
Ünlü, A. (2014, November). Statistical testing of the law of Regular Minimality in perceptual discrimination. Invited talk at the Department of Psychological Sciences, Purdue University, Indiana, USA.
Ünlü, A., & Dettweiler, U. (2014, July–August). Convex optimization in Self-Determination Theory. Talk at the European Mathematical Psychology Group (EMPG) Meeting, Tübingen, Germany.
Ünlü, A., & Schrepp, M. (2014, July). Biasing effects of non-representative samples of quasi-orders in the assessment of recovery quality of IITA-type item hierarchy mining. Talk at the European Conference on Data Analysis (ECDA), Bremen, Germany.
2013
Gschrey, B., Ünlü, A., Wendt, H., Tarelli, I., & Euen, B. (2013, März). Interaktive Graphiken zur Präsentation und Exploration von Schülerleistungsprofilen in IGLU/TUMSS 2011 [Interactive graphics for the presentation and exploration of students’ proficiency profiles in IGLU/TIMSS 2011]. Vortrag auf der 1. Tagung Bildungsverläufe über die Lebensspanne der Gesellschaft für Empirische Bildungsforschung (GEBF 2013), Kiel, Germany.
Gschrey, B., Ünlü, A., Wendt, H., Valtin, R. & Bos, W. (2013, September). Profiling and comparing multi-competence proficiency patterns by means of background characteristics across varying achievement dimensions. Vortrag auf der Tagung der European Conference on Educational Research (ECER), Istanbul, Turkey.
Schurig, M., Ünlü, A., Wendt, H., & Valtin, R. (2013, März). Anwendung und Vergleich von Clusterverfahren zur Gewinnung und Beschreibung von Leistungsprofilen in IGLU/TIMSS 2011 [Application and comparison of clustering methods for the generation and characterization of proficiency profiles in IGLU/TIMSS 2011]. Vortrag auf der 1. Tagung Bildungsverläufe über die Lebensspanne der Gesellschaft für Empirische Bildungsforschung (GEBF 2013), Kiel, Germany.
Schurig, M., Ünlü, A., Wendt, H. & Bos, W. (2013, September). Robust estimation of the dimensionality structure for the PIRLS/TIMSS 2011 achievement dimensions. Vortrag auf der Tagung der European Conference on Educational Research (ECER), Istanbul, Turkey.
Stubben, S., & Ünlü, A. (2013, März). Vergleich allgemeiner psychometrisch-diagnostischer Skalierungsansätze [Comparison of general psychometric-diagnostic scaling approaches]. Vortrag auf der 1. Tagung Bildungsverläufe über die Lebensspanne der Gesellschaft für Empirische Bildungsforschung (GEBF 2013), Kiel, Germany.
Ünlü, A. (2013, Januar). Ausblick und historischer Abriss über psychometrische und mathematisch-psychologische Perspektiven zur Messung latenter Größen [Review and historical overview of psychometric and mathematical-psychological perspectives in the measurement of latent entities]. Eingeladener Vortrag am Lehrstuhl für Statistik, Wirtschaftswissenschaftliche Fakultät, Universität Augsburg, Germany.
Pietsch, M., & Ünlü, A. (2013, March). IRT-Skalierung: Latent Trait und Latent Class Modelle. Talks for a methods workshop at the Society for Empirical Educational Research (GEBF) 2013 Conference, Kiel University, Kiel, Germany.
Ünlü, A. & Stubbe, C. (2013, September). Jahrgangsübergreifender Unterricht in den Grundschulen der Deutschsprachigen Gemeinschaft Belgiens [Inter-year teaching in elementary schools of the german speaking community of Belgium]. Vortrag auf der 78. Tagung der Arbeitsgruppe für Empirische Pädagogische Forschung [Working Group for Empirical Pedagogical Research] (AEPF), Dortmund, Germany.
Wendt, H., Bos, W., Ünlü, A., Valtin, R., Euen, B., Kasper, D., & Tarelli, I. (2013, März). Leistungstestwerte und Kompetenzprofile von Grundschulkindern am Ende der vierten Jahrgangsstufe in Deutschland [Proficiency test scores and competence profiles of fourth grade primary school children in Germany]. Vortrag auf der 1. Tagung Bildungsverläufe über die Lebensspanne der Gesellschaft für Empirische Bildungsforschung (GEBF 2013), Kiel, Germany.
Wendt, H., Ünlü, A., Tarelli, I. & Schurig, M. (2013, September). Narrowed Achievement Gap or Changes in Demographics?: Interpreting Germany´s PIRLS Trend Relative to Shifts in Background Characteristics. Vortrag auf der Tagung der European Conference on Educational Research (ECER), Istanbul, Germany.
2012
Huelmann, T., Ünlü, A., Bos, W., & Gebauer, M.M. (2012, September). Kognitive Diagnose Modelle in Large Scale Assessments: Anwendung der Rule Space Methode auf die TIMSS 2007 Daten [Cognitive diagnosis models in large scale assessments: Application of the rule space method to TIMSS 2007 data]. Vortrag auf Sektionstagung Vielfalt empirischer Forschung in Bildung, Erziehung und Sozialisation der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2012), Bielefeld, Germany.
Kasper, D., & Ünlü, A. (2012, August). Sensitivity analyses for the Rasch model. Talk at the 36th Annual Conference of the German Classification Society (GfKl), Hildesheim, Germany.
Kasper, D., & Ünlü, A. (2012, September). Skalierung in PISA: Wie sensitiv sind verschiedene Skalierungsverfahren? [Scaling in PISA: How sensitive are various scaling procedures?]. Vortrag auf Sektionstagung Vielfalt empirischer Forschung in Bildung, Erziehung und Sozialisation der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2012), Bielefeld, Germany.
Schwabe, F., Gebauer, M. M., El-Khechen, W., Ünlü, A., & McElvany, N. (2012, April). Fairness of language tests for students from various linguistic backgrounds. Talk at the Annual Meeting of the American Educational Research Association (AERA), Vancouver, Canada.
Stubben, S., Ünlü, A., & Trendtel, M. (2012, September). Model based classification for diagnostic psychometric measurement. Talk at the Workshop on Model Based Clustering and Classification (MBC2), Catania, Italy.
Trendtel, M., & Ünlü, A. (2012, August). Using latent class models with random effects for investigating local dependence. Talk at the 36th Annual Conference of the German Classification Society (GfKl), Hildesheim, Germany.
Ünlü, A. (2012, Januar). Latente Klassen und Zufallseffekte: Eine psychometrische Anwendung auf Wissensstrukturen [Latent classes and random effects: A psychometric application to knowledge structures]. Eingeladener Vortrag in Fachbereichskolloquium des Instituts für Psychologie und des Instituts für Psychologie in Bildung und Erziehung, Westfälische Wilhelms-Universität Münster, Germany.
Ünlü, A. (2012, Februar). Mathematik und Statistik in der Untersuchung mentaler Testwerte [Mathematics and statistics in the study of mental test scores]. Vortrag auf Dortmunder Tag der Statistik (DOTS 2012), Fakultät Statistik, Technische Universität Dortmund, Germany.
Ünlü, A., Kasper, D., & Trendtel, M. (2012, August). The OECD’s Programme for International Student Assessment (PISA) study: A review of its basic psychometric concepts. Talk at the 36th Annual Conference of the German Classification Society (GfKl), Hildesheim, Germany.
Ünlü, A., Trendtel, M, & Kasper, D. (2012, Juli). Sensitivität und Abhängigkeitsstrukturen in der Modellierung von Large-Scale-Assessment-Studien [Sensitivity and dependence structures in the modeling of large scale assessment studies]. Eingeladener Vortrag in Arbeitsgruppe für Technology Based Assessment am Deutschen Institut für Internationale Pädagogische Forschung [German Institute for International Educational Research] (DIPF), Frankfurt am Main, Germany.
2011
George, A.C., Kiefer, T., Ünlü, A., & Robitzsch, A. (2011, März). Das R Paket CDM: Einführung, Implementation und Anwendung Kognitiver Diagnostischer Modelle. Vortrag auf Sektionstagung empirische Bildungsforschung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2011), Bamberg, Deutschland.
George, A.C., & Ünlü, A. (2011, Juli). Parameter estimation in skills-based knowledge space theory and cognitive diagnosis models: A comparison. Poster at the 26th International Workshop on Statistical Modelling (IWSM 2011), Valencia, Spain.
Schwabe, F., Ünlü, A., McElvany, N., & Bos, W. (2011, März). Testfairness gegenüber Migranten: DIF-Analysen von Wort- und Figuranalogieitems des KFT. Vortrag auf Sektionstagung empirische Bildungsforschung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2011), Bamberg, Deutschland.
Trendtel, M., & Ünlü, A. (2011, September). Convex optimization as a tool for correcting dissimilarity matrices for regular minimality. Vortrag auf der Joint Conference of the German Classification Society (GfKl) and the German Association for Pattern Recognition (DAGM), Frankfurt am Main, Deutschland.
Ünlü, A. (2011, März). Wissensräume. Vortrag auf Sektionstagung empirische Bildungsforschung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2011), Bamberg, Deutschland.
Ünlü, A. (2011, September). Datenanalytische Verfahren zur Ableitung von Lösbarkeitshierarchien zwischen Testitems. Vortrag auf Sektionstagung Baustelle Lehrerbildung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2011), Klagenfurt, Österreich.
Ünlü, A. (2011, November). Kombinatorische und diagnostische Modellierung zur personalisierten und differenzierten Wissens- und Kompetenzerfassung. Eingeladener Vortrag in Kolloquiumsreihe der Forschergruppe und des Graduiertenkollegs Naturwissenschaftlicher Unterricht, Universität Duisburg-Essen, Deutschland.
2010
Arslan, C., & Furtner, A. (2010, September). An empirical comparison of latent class and cluster ensemble analysis for segmentation in market research. Talk at the German-French-Austrian Conference on Marketing 2010 (GFA2010), Vienna, Austria.
George, A. C., & Ünlü, A. (2010, September). Diagnostische Wissensstrukturmodelle: Eine Anwendung auf den PIRLS Reader 2001 für deutsche Grundschüler [Diagnostic knowledge structure models: An application to the PIRLS Reader 2001 for German elementary school pupils]. Poster at the 74. Tagung der Arbeitsgruppe für Empirische Pädagogische Forschung (AEPF 2010), Jena, Germany.
George, A. C., & Ünlü, A. (2010, March). Diagnostic knowledge structure models: A review and comparison. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Haidinger, A., & Ünlü, A. (2010, March). Skills and competencies models in knowledge space theory: The R package skills. Poster at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Kiefer, T., & Ünlü, A. (2010, March). A Fechnerian scaling approach to model selection in psychometrics. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Kiefer, T., & Ünlü, A. (2010, October). Fechnerian scaling of IRT models for dichotomous data. Talk at the 26th Annual Meeting of the International Society for Psychophysics (Fechner Day 2010), Padua, Italy.
Sargin, A., & Ünlü, A. (2010, March). Einführung in die Wissensraumtheorie [Introduction to knowledge space theory]. Invited talk at the Institut für Schulentwicklungsforschung, University of Dortmund, Germany.
Sargin, A., & Ünlü, A. (2010, March). Graphics for the one-parameter logistic model. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Trendtel, M., & Ünlü A. (2010, March). On the probability for sampling a matrix of discrimination probabilities satisfying regular minimality in Fechnerian scaling. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Trendtel, M., & Ünlü, A. (2010, October). With what probability regular minimality can be satisfied by chance? Talk at the 26th Annual Meeting of the International Society for Psychophysics (Fechner Day 2010), Padua, Italy.
Ünlü, A. (2010, February). Eine Einführung in die nichtparametrische Item-Response-Theorie, mit Fokus auf stochastischen Ordnungseigenschaften [An introduction to nonparametric item response theory, with an emphasis on stochastic ordering properties]. Invited talk at the Department of Statistics, Ludwig-Maximilians-University Munich, Germany.
Ünlü, A., Kiefer, T., & Dzhafarov, E.N. (2010, February). The R package fechner. Talk at the 2nd Workshop on Psychometric Computing, Department of Statistics, Ludwig-Maximilians-University Munich, Germany.
Ünlü, A., & Sargin, A. (2010, March). Inductive item tree analysis. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
Ünlü, A., & Trendtel, M. (2010, October). Testing for regular minimality. Talk at the 26th Annual Meeting of the International Society for Psychophysics (Fechner Day 2010), Padua, Italy.
Weigl, K., & Ünlü A. (2010, March). Bootstrap und Anwendungen in R: Eine didaktische Aufbereitung [The bootstrap and applications in R: A didactic]. Talk at the 2nd Joint Statistical Meeting of the German Working Group on Statistics (DAGStat2010), Dortmund, Germany.
2009
Kiefer, T., & Ünlü, A. (2009, March). The R package fechner for Fechnerian scaling. Talk at the 11th International Federation of Classification Societies (IFCS) Conference, Dresden, Germany.
Kiefer, T., Ünlü, A., & Dzhafarov, E. N. (2009, August). Fechnerian scaling in R. Talk at the 42nd Annual Meeting of the Society for Mathematical Psychology (SMP) and the 40th Annual Conference of the European Mathematical Psychology Group (EMPG), Amsterdam, The Netherlands.
Sargin, A., & Ünlü, A. (2009, March). The R package DAKS: Basic functions and complex algorithms in knowledge space theory. Talk at the 11th International Federation of Classification Societies (IFCS) Conference, Dresden, Germany.
Ünlü, A. (2009, August). Mosaic visualization for knowledge space theory. Talk at the 42nd Annual Meeting of the Society for Mathematical Psychology (SMP) and the 40th Annual Conference of the European Mathematical Psychology Group (EMPG), Amsterdam, The Netherlands.
Ünlü, A., & Malik, W. A. (2009, July). Interactive graphical exploration of psychometric multivariate data using glyph representations. Talk at the 16th International Meeting of the Psychometric Society (IMPS), Cambridge, United Kingdom.
2008
Sargin, A., & Ünlü, A. (2008, June). Mosaic plots for knowledge space theory. Talk at the 6th International Workshop on Statistical Graphics: Data and Information Visualization in Today’s Multimedia Society (DataViz), Bremen, Germany.
Sargin, A., & Ünlü, A. (2008, September). Improved inductive item tree analysis. Talk at the 39th European Mathematical Psychology Group (EMPG) Meeting, Graz, Austria.
Ünlü, A. (2008, March). Stochastic ordering in psychometrics. Talk at the 8th International Conference on Ordered Statistical Data and Its Applications, Aachen, Germany.
Ünlü, A. (2008, October). Psychometric theory of knowledge structures: Latent class modeling with random effects, stochastic ordering, and exploratory item analysis. Invited talk at the Statistics Colloquium, Faculty of Statistics, University of Technology Dortmund, Germany.
Ünlü, A., & Sargin, A. (2008, September). Evaluating fit measures for quasi orders. Invited talk at the Symposium "Knowledge and Competence Structures and their Applications" of the 39th European Mathematical Psychology Group (EMPG) Meeting, Graz, Austria.
Weigl, K., Papousek, I., & Ünlü, A. (2008, September). Bootstrapping EEG data. Talk at the 39th European Mathematical Psychology Group (EMPG) Meeting, Graz, Austria.
2007
Ünlü, A. (2007, March). Modified item tree analysis: An empirical application of the coefficient kappa to discrete multivariate inductive reasoning data. Talk at the 31st Annual Conference of the German Classification Society on Data Analysis, Machine Learning, and Applications, Freiburg, Germany.
Ünlü, A. (2007, March). Misclassified response data in psychometrics. Talk at the 1st Joint Statistical Meeting of the German Working Group on Statistics, Bielefeld, Germany.
2006
Ünlü, A. (2006, January). Multi-parameter models, estimation, identifiability, and model selection. Invited talk at the Center for Adaptive Behavior and Cognition, Max Planck Institute for Human Development, Berlin, Germany.
Ünlü, A. (2006, March). Estimation of response error rates in knowledge space theory: A psychometric application of a biometric random effects approach. Invited talk at the Department of Psychology, McGill University, Montreal, Canada.
Ünlü, A. (2006, October). Exploratory latent class cluster analysis: From data via mathematical modeling to statistics and software application. Invited talk at the Department of Computer Oriented Statistics and Data Analysis, Institute of Mathematics, University of Augsburg, Germany.
Ünlü, A. (2006, November). Handling categorical latent variables. Invited talk at the Department of Psychology, Middle East Technical University, Ankara, Turkey.
2005
Ünlü, A. (2005, April). Goodman-Kruskal-type model evaluation in knowledge space theory. Invited talk at the Department of Psychological Sciences, Purdue University, Indiana, USA.
Ünlü, A. (2005, July). The basic local independence model in knowledge space theory and axioms/properties in nonparametric item response theory. Talk at the 14th International Meeting of the Psychometric Society (IMPS), Tilburg, The Netherlands.
Ünlü, A., & Albert, D. (2005, September). Towards a nonparametric probabilistic approach in knowledge space theory. Talk at the 36th European Mathematical Psychology Group (EMPG) Meeting, Padua, Italy.
2004
Ünlü, A. (2004, August). Formal modeling in cross-cultural psychology: Selecting among knowledge structures using the coefficient kappa. Poster presented at the 28th International Congress of Psychology, Beijing, China.
Ünlü, A. (2004, September). Estimating response error rates by means of latent class modeling with random effects. Talk at the 35th European Mathematical Psychology Group (EMPG) Meeting, Ghent, Belgium.