Alex Petrov's Professional Home Page


Dr. Alexander A. Petrov
Associate Professor
Laboratory for Cognitive Modeling and Computational Cognitive Neuroscience
Department of Psychology
Ohio State University

200B Lazenby Hall
1827 Neil Avenue
Columbus, OH 43210
Email: apetrov [at] alexpetrov [you know what]


Welcome and thanks for stopping by!

Research Interests

I am a cognitive scientist. My research interests include:

Methodologically, research in the CogMod/CCN Lab involves a combination of behavioral and psychophysical experimentation, mathematical and computational modeling, eyetracking and pupillometry. Typically, the papers that we publish involve both empirical data and computational models. We also use and develop sophisticated models to analyze the behavioral data collected in the lab or in collaboration with other labs.

The lab website provides more detail on some current research projects.


The CogMod Lab is looking to accept a new graduate student for the incoming class of 2019. Visit our lab website for detailed information on how to apply.

The Matlab implementation of the Divisive Normalization Model is now available on GitHub. A YouTube podcast is also available. See Sawada & Petrov (2017) for the journal article.

Our paper (Hayes & Petrov, 2016a) received the Best Article of the Year award for Behavior Research Methods in 2016.

Selected Publications

A complete list of publications (as of December 2017) is available separately, organized by outlet type, topic, or in reverse chronological order.
My curriculum vitae is also available (pdf).

Sawada, T. & Petrov, A. (2017)
The divisive normalization model of V1 neurons: A comprehensive comparison of physiological data and model predictions. Journal of Neurophysiology, 118 (6), 3051-3091. doi: 10.1152/jn.00821.2016.
Abstract Reprint (pdf) Software (on GitHub) YouTube podcast Companion article
Hayes, T. & Petrov, A. (2016a)
Mapping and correcting the influence of gaze position on pupil size measurements. Behavior Research Methods, 48 (2), 510-527. Award: Best Article of the Year.
Abstract Reprint (pdf)
Hayes, T. & Petrov, A. (2016b)
Pupil diameter tracks the exploration-exploitation tradeoff during analogical reasoning and explains individual differences in fluid intelligence. Journal of Cognitive Neuroscience, 28 (2), 308-318.
Abstract Reprint (pdf)
Hayes, T., Petrov, A. & Sederberg, P. (2015)
Do We Really Become Smarter When Our Fluid-Intelligence Test Scores Improve? Intelligence, 48 (1), 1-14.
Abstract Reprint (pdf) Companion article
Petrov, A. & Hayes, T. R. (2010)
Asymmetric transfer of perceptual learning of luminance- and contrast-modulated motion. Journal of Vision, 10 (14:11), 1-22,
Abstract Reprint (pdf) Matlab reports (html)
Petrov, A. (2009)
Symmetry-based methodology for decision-rule identification in same-different experiments. Psychonomic Bulletin & Review, 16(6), 1011-1025.
Abstract Reprint (pdf)
Petrov, A., Dosher, B., & Lu, Z.-L. (2005)
The Dynamics of Perceptual Learning: An Incremental Reweighting Model. Psychological Review, 112(4), 715-743.
Abstract Reprint (pdf) Data sets Software
Petrov, A. & Anderson, J. R. (2005)
The Dynamics of Scaling: A Memory-Based Anchor Model of Category Rating and Absolute Identification. Psychological Review, 112(2), 383-416.
Abstract Reprint (pdf) Software
Kokinov, B. & Petrov, A. (2001)
Integrating memory and reasoning in analogy-making: The AMBR model. In D. Gentner, K. Holyoak, & B. Kokinov (Eds.), The analogical mind: Perspectives from cognitive science (pp. 59-124). Cambridge, MA: MIT Press.
Abstract Excerpts Preprint (pdf)

Branching Out

My teaching home page provides access to course syllabi, reading assignments, presentation slides, and various student resources.

A sizable portion of this site is devoted to assorted ideas of general interest: philosophy, humanism, politics, science, astronomy, aikido, ... Life is so interesting and deep, check it out!

My personal home page was meant to publish photos of my daughter and wife for the benefit of my extended family in Bulgaria. This idea, however, was made obsolete by the advent of Facebook. You are welcome to visit us at

Last but not least, help support Max and other kids with short gut/ short bowel syndrome and TPN-associated Liver Disease. If you know anyone with these conditions, spread the word about Omegaven. It saves lives! Check the validity of this page's XHTML Check the validity of this site's Cascading Style Sheet Page maintained by Alex Petrov
Created 1999-06-01, last updated 2017-12-14.