Evaluating the human ongoing visual search performance by eye tracking application and sequencing tests
Abstract Human visual search is an everyday activity that enables humans to explore the real world. Given the visual input, during a visual search, it is necessary to select some aspects of input to shift the gaze to next target. The aim of the study is to develop a mathematical method able to evalu...
Saved in:
Published in | Computer methods and programs in biomedicine Vol. 107; no. 3; pp. 468 - 477 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ireland Ltd
01.09.2012
Elsevier |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Abstract Human visual search is an everyday activity that enables humans to explore the real world. Given the visual input, during a visual search, it is necessary to select some aspects of input to shift the gaze to next target. The aim of the study is to develop a mathematical method able to evaluate the visual selection process during the execution of a high cognitively demanding task such as the trial making test part B (TMT). The TMT is a neuro-psychological instrument where numbers and letters should be connected to each other in numeric and alphabetic order. We adapted the TMT to an eye-tracking version, and we used a vector model, the “eight pointed star” (8PS), to discover how selection (fixations) guides next exploration (saccades) and how human top-down factors interact with bottom-up saliency. The results reported a trend to move away from the last fixations correlated to the number of distracters and the execution performance. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0169-2607 1872-7565 |
DOI: | 10.1016/j.cmpb.2011.02.006 |