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Brain differences in how obsessive-compulsive patients process uncertainty compared to controls

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Stern, E., Welsh, R., Gonzalez, R., Fitzgerald, K., Abelson, J., & Taylor, S. (2013). Subjective uncertainty and limbic hyperactivation in obsessive-compulsive disorder. Human Brain Mapping. 34, 1956-1970. DOI: 10.1002/hbm.22038 …

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Decision Making
Statistics/Methods
Design Science
Brain Imaging
Psychology

Decision Making, Psychology, Statistics/Methods »

Extending our approach of choosing the next query in decision making studies: Testing probability weighting functions

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Cavagnaro, D., Pitt, M., Gonzalez, R., \& Myung, J. (2013). Discriminating among probability weighting functions using adaptive design optimization. {\it Journal of Risk and Uncertainty, 47,} 255-289. 10.1007/s11166-013-9179-3  PDF

Abstract

Probability weighting functions relate objective probabilities and their subjective weights, and play a central role in modeling choices under risk within cumulative prospect theory. While several different parametric forms have been pro- posed, their qualitative similarities make it challenging to discriminate among them empirically. In this paper, we use both simulation and choice experiments to inves- tigate the extent to which different parametric forms of the probability weighting function can be discriminated using adaptive design optimization, a computer-based methodology that identifies and exploits model differences for the purpose of model discrimination. The simulation experiments show that the correct (data-generating) form can be conclusively discriminated from its competitors. The results of an empir- ical experiment reveal heterogeneity between participants in terms of the functional form, with two models (Prelec-2, Linear-in-Log-Odds) emerging as the most com- mon best-fitting models. The findings shed light on assumptions underlying these models.

Does having a companion present when consulting an oncologist help the cancer patient process information better?

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Eggly, S., Penner, L., Hagiwara, N., Gonzalez, R., Harper, F., Heath, E., \& Albrecht, T. (2013). Patient, companion, and oncologist perceptions of information discussed during oncology clinical interactions. {\it Psych-Oncology, …

A call to take a population approach to neuroscience

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Falk, E., Hyde, L., Mitchel, C., Faul, J., Gonzalez, R., Heitzeg, M., Keating, D., Langa, K., Martz, M., Maslowsky, J., Morrison, F., Noll, D., Patrick, M., Pfeffer, P., Reuter-Lorenz, P., …

What does the ratio of physician-patient talk time during actual medical interactions have to do with race?

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Hagiwara, N., Penner, L., Gonzalez, R., Eggly, S., Dovidio, J., Gaertner, S., West, T., \& Albrecht, T. (2013). Racial attitudes, physician-patient talk time ratio, and adherence in racially discordant medical …

Health disparities among blacks: It isn’t just due to skin color

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Hagiwara, N., Penner, L., Gonzalez, R., Eggly, S., \& Albrecht, T. (2013). Within-group health disparities among Blacks: The effects of Afrocentric features and unfair treatment. {\it Cultural Diversity \& Ethnic Minority Psychology, …

Exploiting a well-known bias to infer some detailed properties of how we distort probabilities

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We make use of a series of choice questions based on the common consequence setup, much like the classic Allais problem, to show that we can infer concavity and convexity …