Fig. 3
Experimental set up. (A) The participants stood in front of a semi-circular panoramic display and could see the image with a visual angle of 100°. The participants wore an onboard SMI oculometer and three Polhemus markers attached at the level of the head, upper back and lower back. The experimental images (designed in an ecological way) were projected on the panoramic screen. The participant was positioned in front of the display. Two experimental images are illustrated in B and C. (B) In the free-viewing task, there was no red square and no target to be found. The participants simply explored the image with no specific goal. (C) In the search task, a red square was shown at the top and middle of the image to show a target to be found within the image. Once the participants had located the target within the image, they had to look at it and click on the mouse (to validate their finding) and to search to locate a new target.
