Ehtibar Dzhafarov

Degree: Ph.D. Moscow (Lomonosov) State University, Russia, 1979, Mathematical, Cognitive

Research Interests:

My research deals with behavior in a broad and interdisciplinary sense: while experimental work is confined to human behavior, mathematical theories apply to abstract systems encompassing diverse research fields within and outside psychology. Thus, the same system of random variables can describe human decision making and quantum spin measurements in elementary particles; the same topological language applies to sensory discrimination and measurement gadgets; the same geometry describes subjective dissimilarities among perceived objects and space in the general relativity theory. Graduate training in this field is interdisciplinary and requires in-depth mastery of certain areas of mathematics.

Recent Publications:

Kujala, J.V., & Dzhafarov, E.N. (2019). Measures of contextuality and noncontextuality. Philosophical Transactions of the Royal Society A 377:20190149. (available as arXiv:1903.07170.)

Dzhafarov, E.N. (2019). On joint distributions, counterfactual values, and hidden variables in understanding contextuality. Philosophical Transactions of the Royal Society A 377:20190144. (available as arXiv:1809.04528.)

Basieva, I., Cervantes, V.H., Dzhafarov, E.N., Khrennikov, A. (2019). True contextuality beats direct influ- ences in human decision making. Journal of Experimental Psychology: General 148, 1925-1937 (available as arXiv:1809.04528.)

Cervantes, V.H., Dzhafarov, E.N. (2019). True contextuality in a psychophysical experiment. Journal of Mathemat- ical Psychology 91, 119-127. (available as arXiv:1812.00105.)

Dzhafarov, E.N., Kon, M. (2018). On universality of classical probability with contextually labeled random variables. Journal of Mathematical Psychology 85, 17-24. (available as arXiv:1710.07847.)

Cervantes, V.H., & Dzhafarov, E.N. (2018). Snow Queen is evil and beautiful: Experimental evidence for proba- bilistic contextuality in human choices. Decision 5, 193-204. (available as arXiv:1711.00418.)

Dzhafarov, E.N. (2018). Replacing nothing with something special: Contextuality-by-Default and dummy measure- ments. In A. Khrennikov & T. Bourama (Eds) Quantum Foundations, Probability and Information, pp. 39-44. Berlin: Springer. (available as arXiv:1703.06752.)

Dzhafarov, E.N., Kujala, J.V. (2018). Contextuality analysis of the double slit experiment (with a glimpse into three slits). Entropy 20, 278; doi:10.3390/e20040278. (available as arXiv:1801.10593.)

Dzhafarov, E.N., Cervantes, V.H., & Kujala, J.V. (2017). Contextuality in canonical systems of random variables.. Philosophical Transactions of the Royal Society A 375: 20160389. (available as arXiv:1703.01252.)

Cervantes, V.H., & Dzhafarov, E.N. (2017). Advanced analysis of quantum contextuality in a psychophysical double- detection experiment. Journal of Mathematical Psychology 79, 77-84. (available as arXiv:1611.04184.)

Dzhafarov, E.N., & Kujala, J.V. (2017). Probabilistic foundations of contextuality. Fortschritte der Physik 65, 1600040 (1-11). (available as arXiv:1604.08412.)

Dzhafarov, E.N., & Kujala, J.V. (2017). Contextuality-by-Default 2.0: Systems with binary random variables. In J.A. de Barros, B. Coecke, E. Pothos (Eds.) Lecture Notes in Computer Science 10106, 16-32. (available as arXiv:1604.04799.)

Cervantes, V.H., & Dzhafarov, E.N. (2017). Exploration of contextuality in a psychophysical double-detection experiment. In J.A. de Barros, B. Coecke, E. Pothos (Eds.) Lecture Notes in Computer Science 10106, 182-193. (available as arXiv:1604.04800.)

Zhang, R., & Dzhafarov, E.N. (2017). Testing contextuality in cyclic psychophysical systems of high ranks. In J.A. de Barros, B. Coecke, E. Pothos (Eds.) Lecture Notes in Computer Science 10106, 151-162. (available as arXiv:1604.04801.)

Dzhafarov, E.N. (2016). Stochastic unrelatedness, couplings, and contextuality. Journal of Mathematical Psychology 75C, 34-41. (available as arXiv:1506.08218.)

Dzhafarov, E.N., & Kujala, J.V. (2016). Context-content systems of random variables: The contextuality-by-default theory. Journal of Mathematical Psychology 74, 11-33. (available as arXiv:1511.03516.)

Dzhafarov, E.N., & Kujala, J.V. (2016). Probability, random variables, and selectivity. In W.Batchelder, H. Colonius, E.N. Dzhafarov, J. Myung (Eds), pp. 85-150. The New Handbook of Mathematical Psychology. Cambridge University Press. (available as arXiv:1312.2239.)

Dzhafarov, E.N., Kujala, J.V., Cervantes, V.H., Zhang, R., & Jones, M. (2016). On contextuality in behavioral data. Philosophical Transactions of the Royal Society A 374: 20150234. (available as arXiv:1508.04751.)

Kujala, J.V., & Dzhafarov, E.N. (2016). Proof of a conjecture on contextuality in cyclic systems with binary variables. Foundations of Physics 46, 282-299. (available as arXiv:1503.02181.)


Ehtibar Dzhafarov

Professor, Mathematical & Computational Cognitive Science

Mailing Address:
Department of Psychological Sciences
Purdue University
703 Third Street
West Lafayette, IN 47907-2081 USA

Campus Address:
Peirce Hall, Room 365D


Telephone:  (765) 494-5645


CV: Ehtibar Dzhafarov.pdf


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