Christian Luhmann, Ph.D.
Vanderbilt University 2006
Associate Professor, Cognitive Science
Office: Psychology B-250
Office Hours: Flexible, by appointment
Phone Number: (631) 632-7086

Areas of Interest: Decision making, learning, and computational modeling.

Current Research
My lab focuses on complex behavior with a particular focus on decision making and learning and the interplay between these behaviors. We explore these interests in a variety of domains. We also use a variety of methodological tools, including behavior and computational modeling as well as neuroscientific methods such as EEG and fMRI. I am interested in how people make decisions in the face of incomplete, inconsistent, ambiguous, or uncertain information. I am exploring this interest in a variety of domains. Utilizing behavioral and computational methods, my work in the area of learning suggests that learners are adept at dealing with incomplete data, a situation ignored by current learning theories. Utilizing functional magnetic resonance imaging, my work in economic decision-making explores the neural bases of decision-makers' ability to foresee, evaluate, and react to the presence of uncertainty. My behavioral work on perceptual decision-making explores both how even relatively simple decisions involve integrating noisy information over time and how decision-makers evaluate quantities such as confidence.

Select Publications
Bixter, M. T., & Luhmann, C. C. (in press). Evidence for implicit risk: Delay facilitates the processing of uncertainty. Journal of Behavioral Decision Making.

Bixter, M. T., & Luhmann, C. C. (2014). Shared losses reduce sensitivity to risk: A laboratory study of moral hazard, Journal of Economic Psychology, 42, 63-73.

Luhmann, C. C. (2013). Discounting of delayed rewards is not hyperbolic. Journal of Experimental Psychology: Learning, Memory, and Cognition, 39, 1274-1279.

Liu, P., & Luhmann, C. C. (2013). Evidence that a transient, but cognitively demanding process underlies forward blocking. Quarterly Journal of Experimental Psychology, 66, 744-766.

Kujawa, A., Smith, E., Luhmann, C. C., & Hajcak, G. (2013). The feedback negativity reflects favorable compared to non-favorable outcomes based on global, not local, alternatives. Psychophysiology, 50, 134-138.

Weinberg, A., Luhmann, C. C., Bress, J. N., & Hajcak, G. (2012). Better late than never? The effect of feedback delay on ERP indices of reward processing, Cognitive, Affective, and Behavioral Neuroscience, 12, 671-677.

Luhmann, C. C., Ishida, K., & Hajcak, G. (2011). Intolerance of uncertainty and decisions about delayed, probabilistic rewards. Behavior Therapy, 42, 378-386.

Luhmann, C. C., Chun, M. M., Yi, D., Lee, D., & Wang, X. (2008). Neural dissociation of delay and uncertainty in inter-temporal choice. Journal of Neuroscience, 28, 14459-14466.

Luhmann, C. C., & Ahn, W. (2007). BUCKLE: A model of unobserved cause learning, Psychological Review, 114, 657-677.