TY  - CONF
AU  - Jorge Bernal
AU  - Fernando Vilariño
AU  - F. Javier Sanchez
AU  - M. Arnold
AU  - Anarta Ghosh
AU  - Gerard Lacey
A2  - ETRA
PY  - 2014//
TI  - Experts vs Novices: Applying Eye-tracking Methodologies in Colonoscopy Video Screening for Polyp Search
BT  - 2014 Symposium on Eye Tracking Research and Applications
SP  - 223
EP  - 226
N2  - We present in this paper a novel study aiming at identifying the differences in visual search patterns between physicians of diverse levels of expertise during the screening of colonoscopy videos. Physicians were clustered into two groups -experts and novices- according to the number of procedures performed, and fixations were captured by an eye-tracker device during the task of polyp search in different video sequences. These fixations were integrated into heat maps, one for each cluster. The obtained maps were validated over a ground truth consisting of a mask of the polyp, and the comparison between experts and novices was performed by using metrics such as reaction time, dwelling time and energy concentration ratio. Experimental results show a statistically significant difference between experts and novices, and the obtained maps show to be a useful tool for the characterisation of the behaviour of each group.
SN  - 978-1-4503-2751-0
L1  - http://refbase.cvc.uab.es/files/BVS2014.pdf
UR  - http://dx.doi.org/10.1145/2578153.2578189
N1  - MV; 600.047; 600.060;SIAI
ID  - Jorge Bernal2014
ER  -