[Probcogsci] Talk on Mon April 27

[Angela Yu]

Dear all,

We have a guest speaker (Riccardo Pedersini, postdoc from Jeremy  
Wolfe's lab at Harvard) on Monday at the Natcomp lab meeting.  Please  
let me know if you would like to meet with the speaker, and your  
availability.

Best wishes,
Angela

Title. Repeated choices in visual and abstract tasks.
Abstract. It is well established that people are uncertainty averse  
(Ellsberg, 1961). Yet, I will compare two series of experiments  
suggesting that people may be better off in decisions under  
uncertainty than in decisions under risk. First, I will discuss a  
visual search task, in which subjects had to search for weapons in  
images of x-rayed bags. Their performance was nearly optimal and they  
tended to maximize value over accuracy. Then, I will present a task  
which mimics visual search, but in fact consists of a series of  
repeated gambles with known probabilities. Subjects, this time, were  
definitely suboptimal. As opposed to visual search, they had all the  
information they needed to compute the optimal strategy, but they did  
not take advantage of it.

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