Lateral presentation alters overall viewing strategy
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Abstract
Eye tracking has been used during face categorisation and identification tasks to identify perceptually salient facial features and infer underlying cognitive processes. However, viewing patterns are influenced by a variety of gaze biases, drawing fixations to the centre of a screen and horizontally to the left side of face images (left-gaze bias). In order to investigate potential interactions between gaze biases uniquely associated with facial expression processing, and those associated with screen location, face stimuli were presented in three possible screen positions to the left, right and centre. Comparisons of fixations between screen locations highlight a significant impact of the screen centre bias, pulling fixations towards the centre of the screen and modifying gaze biases generally observed during facial categorisation tasks. A left horizontal bias for fixations was found to be independent of screen position but interacting with screen centre bias, drawing fixations to the left hemi-face rather than just to the left of the screen. Implications for eye tracking studies utilising centrally presented faces are discussed.
Cite this as
2016. Lateral presentation alters overall viewing strategy. PeerJ Preprints 4:e1926v1 https://doi.org/10.7287/peerj.preprints.1926v1note This preprint is not peer-reviewed. You may wish to reference the subsequent peer-reviewed version of this article.
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This is a submission to PeerJ for review.
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Competing Interests
The authors declare that they have no competing interests.
Author Contributions
Christopher J Luke conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables.
Petra M J Pollux conceived and designed the experiments, analyzed the data, reviewed drafts of the paper.
Human Ethics
The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):
The experiment was granted ethical approval as part of a PhD project from the School of Psychology Research Ethics Committee (Soprec) at the University of Lincoln, conforming to British Psychological Society standards.
Data Deposition
The following information was supplied regarding data availability:
Data and code openly accessible at figshare: Luke, Chris (2016): Lateral Presentation Alters Overall Viewing Strategy. figshare
https://dx.doi.org/10.6084/m9.figshare.3126766.v1
Funding
The authors received no funding for this work.
