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Deriving an appropriate baseline for describing fixation behaviour

Clarke, Alasdair DF and Tatler, Benjamin W (2014) 'Deriving an appropriate baseline for describing fixation behaviour.' Vision Research, 102. 41 - 51. ISSN 0042-6989

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Humans display image-independent viewing biases when inspecting complex scenes. One of the strongest such bias is the central tendency in scene viewing: observers favour making fixations towards the centre of an image, irrespective of its content. Characterising these biases accurately is important for three reasons: (1) they provide a necessary baseline for quantifying the association between visual features in scenes and fixation selection; (2) they provide a benchmark for evaluating models of fixation behaviour when viewing scenes; and (3) they can be included as a component of generative models of eye guidance. In the present study we compare four commonly used approaches to describing image-independent biases and report their ability to describe observed data and correctly classify fixations across 10 eye movement datasets. We propose an anisotropic Gaussian function that can serve as an effective and appropriate baseline for describing image-independent biases without the need to fit functions to individual datasets or subjects.

Item Type: Article
Uncontrolled Keywords: Eye tracking, Central tendency, Salience, Fixation location
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Science and Health > Psychology, Department of
Depositing User: Jim Jamieson
Date Deposited: 07 Mar 2017 13:47
Last Modified: 05 Feb 2019 15:15

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