Journal of vision | |
The saccadic flow baseline: Accounting for image-independent biases in fixation behavior | |
Alasdair D. F. Clarke1  Amelia R. Hunt2  Matthew J. Stainer2  Benjamin W. Tatler2  | |
[1] Department of Psychology, University of Essex, Colchester, UK;School of Psychology, University of Aberdeen, Aberdeen, UK | |
关键词: saccades; fluid flow; datasets; | |
DOI : 10.1167/17.11.12 | |
学科分类:眼科学 | |
来源: Association for Research in Vision and Ophthalmology | |
【 摘 要 】
Much effort has been made to explain eye guidance during natural scene viewing. However, a substantial component of fixation placement appears to be a set of consistent biases in eye movement behavior. We introduce the concept of saccadic flow, a generalization of the central bias that describes the image-independent conditional probability of making a saccade to (xi+1, yi+1), given a fixation at (xi, yi). We suggest that saccadic flow can be a useful prior when carrying out analyses of fixation locations, and can be used as a submodule in models of eye movements during scene viewing. We demonstrate the utility of this idea by presenting bias-weighted gaze landscapes, and show that there is a link between the likelihood of a saccade under the flow model, and the salience of the following fixation. We also present a minor improvement to our central bias model (based on using a multivariate truncated Gaussian), and investigate the leftwards and coarse-to-fine biases in scene viewing.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201902192762827ZK.pdf | 1273KB | download |