Gaze strategies in peripheral motion detection: On the superiority of fixations over smooth pursuit eye movements (SPEM)

Vater, Christian; Hossner, Ernst-Joachim (29 September 2016). Gaze strategies in peripheral motion detection: On the superiority of fixations over smooth pursuit eye movements (SPEM). Perception, 45(2 Suppl). Pion

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Peripheral-motion-change-detection performance was examined by contrasting a fixation with a SPEM condition. To that end, participants were confronted with a visual display consisting of 15 white squares and 1 red square circulating with 6°/s (tracking condition) and stopping in-between (fixation condition). The instruction was to visually follow the red square and to press a button as soon as a white square begins to move. The to-be-detected white square movements varied in eccentricity and speed. A Vicon-integrated eye-tracking system was used for controlling gaze behaviour. Response times (ms) and missed detections (%) were measured as dependent variables. Results in Experiment 1 show faster motion-change detection in fixation vs. tracking condition (401 ms vs. 809 ms) and increased response times as a function of eccentricity in the tracking condition only (4°: 570 ms; 8°: 737 ms; 16°: 1121 ms). Moreover, missed detections were revealed at 16° eccentricity in the tracking condition only. Experiment 2 controlled for foveal load as possible confounder by replacing the red square with a virtual centre evoked by 4 red squares. The same results were obtained as in Experiment 1. In sum, it could be shown that SPEM impair the ability to detect peripheral motion changes.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

07 Faculty of Human Sciences > Institute of Sport Science (ISPW)
07 Faculty of Human Sciences > Institute of Sport Science (ISPW) > Sport Science IV

UniBE Contributor:

Vater, Christian and Hossner, Ernst-Joachim

Subjects:

700 Arts > 790 Sports, games & entertainment

ISSN:

0301-0066

Publisher:

Pion

Language:

English

Submitter:

André Klostermann

Date Deposited:

18 Oct 2016 10:53

Last Modified:

07 Feb 2017 17:05

URI:

https://boris.unibe.ch/id/eprint/89114

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