I study judgement and decision making and the application of this research to real-world choices.
I am currently using the eye movements people make while they make decisions to test models of risky, strategic, and multiattribute choice. I am continuing to develop a mathematical model of choice called decision by sampling, and am extending the model to multiattribute and risky choices. I am also using a mixture of laboratory and on-line experiments, which thus far indicate that concepts like risk aversion are not properties of the individual but are rather properties of the experiment or choice environment.
In my applied work I am continuing research to understand how defaults and anchors influence people's financial decisions using a mixture of laboratory experiments and big real-world data sets.
Walasek, L., & Stewart, N. (2015). How to make loss aversion disappear and reverse: Tests of the decision by sampling origin of loss aversion. Journal of Experimental Psychology: General, 144, 7-11. doi: 10.1037/xge0000039
- Noguchi, T., & Stewart, N. (2014). In the attraction, compromise, and similarity effects, alternatives are repeatedly compared in pairs on single dimensions. Cognition, 132, 44-56. doi: 10.1016/j.cognition.2014.03.006
- Noguchi, T., Stewart, N., Olivola, C. Y., Moat, H. S., & Preis, T. (2014). Characterizing the time-perspective of nations with search engine query data. PLoS ONE, 9, e95209. doi: 10.1371/journal.pone.0095209
- Navarro-Martinez, D., Salisbury, L. C., Lemon, K. N., Stewart, N., Matthews, W. J., & Harris, A. J. L. (2011). Minimum required payment and supplemental information disclosure effects on consumer debt repayment decisions. Journal of Marketing Research, 48, S60-S77. doi: 10.1509/jmkr.48.SPL.S60
Stewart, N., Reimers, S., & Harris, A. J. L. (2015). On the origin of utility, weighting, and discounting functions: How they get their shapes and how to change their shapes. Management Science, 61, 687-705. doi: 10.1287/mnsc.2013.1853
- Ungemach, C., Stewart, N., & Reimers, S. (2011). How incidental values from our environment affect decisions about money, risk, and delay. Psychological Science, 22, 253-260. doi: 10.1177/0956797610396225
- Vlaev, I., Chater, N., Stewart, N., & Brown, G. D. A. (2011). Does the brain calculate value? Trends in Cognitive Sciences, 15, 546-554. doi: 10.1016/j.tics.2011.09.008