Combined effects of expectations and visual uncertainty upon detection and identification of a target in the fog

Detecting a pedestrian while driving in the fog is one situation where the prior expectation about the target presence is integrated with the noisy visual input. We focus on how these sources of information influence the oculomotor behavior and are integrated within an underlying decision-making process. The participants had to judge whether high-/low-density fog scenes displayed on a computer screen contained a pedestrian or a deer by executing a mouse movement toward the response button (mouse-tracking). A variable road sign was added on the scene to manipulate expectations about target identity. We then analyzed the timing and amplitude of the deviation of mouse trajectories toward the incorrect response and, using an eye tracker, the detection time (before fixating the target) and the identification time (fixations on the target). Results revealed that expectation of the correct target results in earlier decisions with less deviation toward the alternative response, this effect being partially explained by the facilitation of target identification.

Publication type: 
Articolo
Author or Creator: 
Quétard, Boris
Quinton, Jean Charles
Colomb, Michèle
Pezzulo, Giovanni
Barca, Laura
Izaute, Marie
Appadoo, Owen Kevin
Mermillod, Martial
Publisher: 
Springer, Berlin , Germania
Source: 
Cognitive processing (Print) 16 (2015): 343–348. doi:10.1007/s10339-015-0673-1
info:cnr-pdr/source/autori:Quétard, Boris; Quétard, Boris; Quinton, Jean Charles; Quinton, Jean Charles; Colomb, Michèle; Pezzulo, Giovanni; Barca, Laura; Izaute, Marie; Izaute, Marie; Appadoo, Owen Kevin; Mermillod, Martial; Mermillod, Martial; Mermillod
Date: 
2015
Resource Identifier: 
http://www.cnr.it/prodotto/i/338298
https://dx.doi.org/10.1007/s10339-015-0673-1
info:doi:10.1007/s10339-015-0673-1
http://www.scopus.com/record/display.url?eid=2-s2.0-84940720225&origin=inward
Language: 
Eng
ISTC Author: 
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