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Biases in the visual perception of heading

Kurtz, M.L. (2017) Biases in the visual perception of heading.

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Abstract:Earlier research has shown that heading can be accurately estimated from visual cues. Nevertheless, studies have shown that people commit constant errors when visually estimating heading. The origin of these biases remains unclear despite research efforts. The visual stimuli used in past research on heading estimation varied considerably. Therefore, we examined the possible effect of stimuli characteristics on heading estimation. Measurements of twenty participants (12 females) were obtained during the study. Participants were shown stimuli depicting horizontal linear motion and were asked to judge the direction of heading as well as to rate vection. Stimuli shown differed in characteristics related to Field of View (FOV), disparity, motion profile, and layout of the scene. A model explaining relationships and effect on bias with a partial mediating effect of vection was hypothesized and estimated via path analysis. Findings indicated that bias away from the fore-aft axis could not be explained by visual properties alone. FOV, disparity and scene had in combination with certain stimuli headings a marginal effect on magnitude of bias, but not direction. Vection had no mediating effect, was however affected by all characteristics. Visual properties thus marginally affect heading estimation, but exact source(s) of biases remain unclear.
Item Type:Essay (Master)
Clients:
Max Planck Insitute for Biological Cybernetics, Tübingen, Germany
Faculty:BMS: Behavioural, Management and Social Sciences
Subject:77 psychology
Programme:Psychology MSc (66604)
Link to this item:http://purl.utwente.nl/essays/73700
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