Dynamic Decision Making Laboratory
PEOPLE
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Current Members

Professor Cleotilde Gonzalez
Varun Dutt
Tomás Lejarraga
Jolie Martin
Wei Siong Neo
Ripta Pasay
Hau-yu Wong
Michael Yu

Past Post-Doc Fellows

Brad Best
Angela Brunstein
Matthew Cronin
Wai-Tat Fu
Octavio H Juarez-Espinosa
Poornima Madhavan
Michael Martin
Jose Quesada
Lelyn Saner
Rickey Thomas

Past Members

Eric Biefeld
Lisa Czlonka
Haritha Dasari
Janice Golenbock
John M Graham
Chris Horn
Semiha Kiziltas
Frank Lacson
Jack Hang Lim
Alex Persoskie
Aanand Radia
Polina M Vanyukov
Colleen M Vrbin
Jacob Wimisberg

Current Members

Cleotilde (Coty) Gonzalez, Ph.D.

Associate Research Professor and Director of DDMLab

Coty is an Associate Research Professor in the department of Social and Decision Sciences at CMU. She earned a Ph.D. in Management Information Systems from Texas Tech University in 1996.

Coty's research program is motivated by the fact that decision making in the real world is more complex than what we have studied in the laboratory and more dynamic than what we can usually investigate with traditional research methodologies. Her research is embedded within a theoretical framework that emphasizes the role and development of experience, the similarity of contexts, and the cognitive abilities of decision makers.

Coty's research lies at the intersection of Behavioral Decision Making, Cognitive Psychology, and Computer Science. She employs a wide range of research methods including laboratory experiments with interactive simulations, computational and cognitive modeling, field data collection, eye-tracking and functional Magnetic Resonance Imagery (fMRI).

office: Porter Hall 223C

web: http://www.andrew.cmu.edu/~conzalez/

e-mail: Generated by TxtNinja.com

phone: 412-268-6242

fax: 412-268-6938

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Varun Dutt, M.S.

Doctoral Student

Varun is currently a Ph.D. student in the Engineering and Public Policy department at Carnegie Mellon University. He earned a Master's in Rational Simulation in the Psychology Department at CMU in 2007 and a M.S. in Computer Science, Information Technology, and Software Engineering in CMU's School of Computer Science in 2006. He had earned a B.S. in Computer Science and Engineering from Thapar Institute of Engineering and Technology, India, in 2004, and worked as a software engineer in one of India's top IT Companies, Tata Consultancy Services (TCS). The current focus of Varun's interests and research has been in the fields of dynamic decision-making, system dynamics modeling (and systems thinking), and modeling human decision making and cognition using the ACT-R modeling framework. Varun has applied himself to investigating problems concerning stocks (accumulations and depletions) and flows. Most importantly, he is interested in answering the question of how people make repeated decisions and why people face so much difficulty in understanding feedback from decisions in simple problems concerning their day to day lives.

Varun is the main tool developer in the DDMLab, developing software simulations and tools for data analysis. His goal is to apply his interests to the field of decision sciences, particularly to the area of dynamic decision making.

office: 4609 Winthrop St., 1st Floor Suite

phone: 412-268-9547, 412-628-1379

email: Generated by TxtNinja.com

web: http://www.andrew.cmu.edu/user/vdutt/index.htm

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Tomás Lejarraga, Ph.D.
Post-Doctoral Fellow

Tomás completed his Ph.D. in Management from the Universitat Pompeu Fabra in Barcelona, Spain; where he was also a part of the Laboratori d'Economia Experimental. His research interests focus on judgment and decision making, particularly on decisions from experience and decisions in complex scenarios.

office: 4609 Winthrop St., 1st floor suite
email: Generated by TxtNinja.com

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Jolie Martin, Ph.D.

Post-Doctoral Fellow

Jolie completed her PhD in Science, Technology, and Management from a joint program between Harvard Business School and Computer Science department. She also holds an MBA from Harvard Business School and a BA from Northwestern University. Jolie's past research explores various aspects of judgment and decision-making, including preferences for risk in experience, sharing of opinions in social networks, and the impact of interface design on user perceptions.

office: 4609 Winthrop St., 1st Floor Suite

email: Generated by TxtNinja.com

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Wei Siong Neo, B.S.

Doctoral Student

Wei Siong is currently a Ph.D. student in the Social and Decision Sciences department at Carnegie Mellon University. He earned a Bachelor of Science degree with Highest Honors in Psychology from the University of Michigan in 2007.

Wei Siong’s research interests, in general, encompass judgment and decision making, as applied to complex, dynamic, and real-world problems. He is interested in how different variables, such as cognitive processes, emotions, individual differences, and social contexts effect learning and decision making. Wei Siong is also interested in examining the different strategies people adopt when controlling dynamic systems and allocating resources.

In investigating dynamic decision making, Wei Siong makes use of several research methods including laboratory experiments, cognitive modeling, and neuroimaging techniques. It is his ambition to better understand human judgment and decision making from the behavioral, computational, and neural perspectives.

office: Porter Hall 321

email: Generated by TxtNinja.com

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Ripta Pasay, B.S.
Research Programmer

Ripta received his Bachelor's in Information Systems and an additional Bachelor's in Statistics from Carnegie Mellon University in 2007. Until recently, he had been working at a large webhosting company as their in-house developer. He now joins DDMLAB as a programmer, where he'll be working on the Instance-Based Learning Tool. Outside of work, Ripta loves travel, snow, and languages; he speaks English, Indonesian, and some Russian.

office: 4609 Winthrop St., 1st floor suite
email: Generated by TxtNinja.com

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Hau-yu Wong, B.S.

Research Associate

Hau-yu completed her undergraduate degree in Psychology and International Relations at Carnegie Mellon University. Her previous research experiences focused on the effect of culture on complex collaboration through computer-mediated communications.

office: 4609 Winthrop St. 1st Floor Suite
email: Generated by TxtNinja.com

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Michael Yu
Doctoral Student

Mike is currently pursuing a Ph.D. in the Social and Decision Sciences department at Carnegie Mellon University. He graduated from the University of Pennsylvania in 2003 with a BS in Economics and a BA in International Studies and French, then spent 5 years as a consultant in the pharmaceutical and medical device industry.

Currently, he is working with the DDM lab in evaluating how cues are synthesized to identify emergency situations under a dynamic environment. More broadly, Mike's current research interests are in the domain of public policy and regulation, with a focus on agency and cooperation, consumer behavior, medical decision making, and behavioral interventions.

email: Generated by TxtNinja.com

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Past Post-Doc Fellows

Brad Best
(Ph.D. in Cognitive Psychology from Carnegie Mellon University)

Dr. Best is a Principal Scientist for Adaptive Cognitive Systems, LLC.

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Angela Brunstein
September 2007 to May 2009
(Ph.D. in Psychology from the University of Hamburg, Germany)

Dr. Brunstein is a teaching faculty at the Qatar campus of Carnegie Mellon University.

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Matthew Cronin
January to June 2005
(Ph.D. in Organizational Behavior from Carnegie Mellon University)

Dr. Cronin is an as Assistant Professor of Management at George Mason University.

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Wai-Tat Fu
September 2006 to May 2007
(Ph.D. of Psychology from George Mason University)

Dr. Fu is an Assistant Professor in the Human Factors Department and the University of Illinois at Urbana-Champaign.

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Octavio H. Juarez-Espinosa
(Ph.D. from Carnegie Mellon University)

Dr. Juarez-Espinosa is a Scientific/Technological Specialist in the Robotics Institute at Carnegie Mellon University.

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Poornima Madhavan
September 2004 to August 2006
(Ph.D. Human Factors and Psychology from University of Illinois at Urbana-Champaign)

Dr. Madhavan is an Assistant Professor in the Department of Psychology and Human Factors Program at Old Dominion University, Norfolk, VA.

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Michael Martin
September 2004 to August 2007
(Ph.D. Cognitive and Experimental Psychology from University of Kansas)

Dr. Martin is a Project Scientist for the Institute for Software Research at Carnegie Mellon University following his work with the lab.

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Jose Quesada
September 2004 to May 2005
(Ph.D. Psychology from University of Granada, Spain)

Dr. Quesada is a researcher at the Adaptive Behavior and Cognition group at the Max Planck Institute in Berlin, Germany.

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Lelyn Saner
2007 to August 2009
(Ph.D. Psychology from the University of Pittsburgh)

Dr. Saner is a Research Professor at the University of Maryland.

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Rickey Paul Thomas
(Ph.D. Psychology from Kansas State University)

Dr. Thomas is an Assistant Professor in the Department of Psychology at Oklahoma University.

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Other Past Members

In Memoriam: Eric Biefeld, M.S.

At the DDMLab, Eric worked on integrating ACT-R with other simulators, focusing on the application of intelligent systems.

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Lisa Czlonka, M.B.A.

Lisa Czlonka completed her undergraduate degree in Psychology and Theology from the University of Notre Dame. She earned her MSW from the University of Hawaii and MBA from Carnegie Mellon's Tepper School of Business in May of 2009.

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Haritha Dasari

Haritha is an undergraduate student at Carnegie Mellon University. She is pursuing a BS in Information Systems and a minor in Business Administration. She is interested in pursuing further education in the field of human-computer interaction, and is excited to be involved with the research at the DDMLAB.

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Janice Golenbock, M.S.

Janice Golenbock was a programmer in the DDMLab, where she made updates to the simulations in the lab and developed software for data analysis and other tools. Following her work with the lab, Janice accepted a position in the computer software industry.

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John M Graham, M.S.

John was a Ph.D. student in the Human Computer Interaction Institute in the School of Computer Science at Carnegie Mellon University. Following his work with the lab, he went on to serve on the faculty in the Behavioral Sciences and Leadership Department at West Point.

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Chris Horn, B.A.

Chris was a part-time Master's student in CMU's Human Computer Interaction Institute (HCII) and worked as a Research Associate in the lab. Following his work in the lab, he took a position in industry in Pittsburgh, PA.

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Semiha Kiziltas, M.S.

Semiha was a PhD student at Carnegie Mellon University, in the Computer Aided Engineering Program and worked as a Research Associate in the lab. Semiha concluded her work with the lab to focus on her thesis.

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Frank Lacson, M.S.

Frank was a Research Associate in the DDM Lab. Following his work with the DDM Lab, Frank accepted a research position for a private industry in San Diego, CA that does contract work with the military.

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Jack Hang Lim, B.S.

Jack was the main tool developer in the DDMLab, developing software simulations and tools for data analysis. Following his work with the lab, Jack moved to Oregon, to work near his family.

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Alex Persoskie, B.S.

Alex received a BS in psychology from Allegheny College in 2005 and is a doctoral student in the Behavioral Decision Research and Psychology program at CMU. Alex is working with Coty on projects that contrast the limited cognitive abilities of human beings with the nearly infinite complexity of the world they must navigate. In general, Alex is interested in how aspects of behavior often seen as "irrational" (e.g., contingent use of decision heuristics, changing tastes, emotions) can be adaptive for an agent of bounded rationality in a dynamic system.

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Aanand Radia, B.S.

Aanand Radia was an undergraduate student working in the lab. Following graduation, he took a position as an associate in Patriot Capital.

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Polina M Vanyukov, B.S.

Polina M Vanyukov completed her undergraduate degree in Logic and Computation at Carnegie Mellon University. She is currently enrolled in a Ph.D. program at University of Pittsburgh.

Lina is the former lab manager, responsible for providing research support, namely, collecting, recording, and analyzing data using experimental methods involving human subjects. She also maintained the lab server and designed web pages. While a graduate student, Lina is continuing her work with the lab, through research on problems of stocks and flows.

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Colleen M Vrbin, B.S.

In May 2001, Colleen earned a Bachelor of Science degree from Carnegie Mellon University in Policy and Management, Political Science, and Social and Decision Science (triple major). She is currently employed through the Jewish Healthcare and Pittsburgh Regional Health Initiative as a research assistant. Her research interests include studying the decision making processes that physicians use in determining appropriate treatment for patients.

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Jacob (Kobi) Wimisberg, M.S.

Kobi was a master's student in the lab. Following his work with the lab, he continued his studies of social psychology at Tel Aviv University, Israel.

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The Dynamic Decision Making Laboratory is part of the Social and Decision Sciences DepartmentCarnegie Mellon University. For updates and comments, please email hauyuw@andrew.cmu.edu.