At first glance, transparency enhances assimilation
Source
Perception, 37, 9, (2008), pp. 1434-1442ISSN
Publication type
Article / Letter to editor
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Organization
SW OZ DCC CO
Former Organization
SW OZ NICI CO
Journal title
Perception
Volume
vol. 37
Issue
iss. 9
Page start
p. 1434
Page end
p. 1442
Subject
Action, intention, and motor control; DI-BCB_DCC_Theme 2: Perception, Action and ControlAbstract
We investigated the role of transparency, perceptual grouping, and presentation time on perceived lightness. Both transparency and perceptual grouping have been found to result in assimilation effects, but only for ambiguous stimulus displays and with specific attentional instructions. By varying the presentation times of displays with two partly overlapping transparent E-shaped objects, we measured assimilation in unambiguous stimulus displays and without specific attentional instructions. The task was to judge which of two simultaneously presented E-shaped objects was darker. With unrestrained presentation times, if a transparency interpretation was possible, assimilation was not found. Inhibiting a transparency interpretation by occluding the local junctions between the two E-shaped objects, did lead to assimilation. With short presentation times, if a transparency interpretation was possible, assimilation was now also found. Thus, we conclude that, although transparency appears to enhance assimilation, with unambiguous stimulus displays and without specific attentional instructions, perceptual grouping is more important for assimilation to occur.
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- Academic publications [238441]
- Electronic publications [122508]
- Faculty of Social Sciences [29483]
- Open Access publications [97504]
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