TY  - JOUR
A1  - Backhaus, Daniel
A1  - Engbert, Ralf
A1  - Rothkegel, Lars Oliver Martin
A1  - Trukenbrod, Hans Arne
T1  - Task-dependence in scene perception: Head unrestrained viewing using mobile eye-tracking
JF  - Journal of vision
N2  - Real-world scene perception is typically studied in the laboratory using static picture viewing with restrained head position. Consequently, the transfer of results obtained in this paradigm to real-word scenarios has been questioned. The advancement of mobile eye-trackers and the progress in image processing, however, permit a more natural experimental setup that, at the same time, maintains the high experimental control from the standard laboratory setting. We investigated eye movements while participants were standing in front of a projector screen and explored images under four specific task instructions. Eye movements were recorded with a mobile eye-tracking device and raw gaze data were transformed from head-centered into image-centered coordinates. We observed differences between tasks in temporal and spatial eye-movement parameters and found that the bias to fixate images near the center differed between tasks. Our results demonstrate that current mobile eye-tracking technology and a highly controlled design support the study of fine-scaled task dependencies in an experimental setting that permits more natural viewing behavior than the static picture viewing paradigm.
KW  - scene viewing
KW  - real-world scenarios
KW  - mobile eye-tracking
KW  - task
KW  - influence
KW  - central fixation bias
Y1  - 2020
U6  - https://doi.org/10.1167/jov.20.5.3
SN  - 1534-7362
VL  - 20
IS  - 5
SP  - 1
EP  - 21
PB  - Association for Research in Vision and Opthalmology
CY  - Rockville
ER  -