Talaslı, Umur

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U.,Talaslı
U., Talasli
Umur, Talasli
Talasli,U.
Talaslı, Umur
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T., Umur
Umur, Talaslı
Talasli, Umur
T.,Umur
Talaslı,U.
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Profesör Doktor
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umur.talasli@atilim.edu.tr
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    Article
    Citation Count: 7
    Applying Emmert's Law to the Poggendorff illusion
    (Frontiers Research Foundation, 2015) Talaslı, Umur; Inan, Asli Bahar; İnan, Aslı Bahar; Department of Psychology
    The Poggendorff illusion was approached with a novel perspective, that of applying Emmert's Law to the situation. The extensities between the verticals and the transversals happen to be absolutely equal in retinal image size, whereas the registered distance for the verticals must be smaller than that of the transversals due to the fact that the former is assumed to occlude the latter. This combination of facts calls for the operation of Emmert's Law, which results in the shrinkage of the occluding space between the verticals. Since the retinal image shows the transversals to be in contact with the verticals, the shrinkage must drag the transversals inwards in the cortical representation in order to eliminate the gaps. Such dragging of the transversals produces the illusory misalignment, which is a dictation of geometry. Some of the consequences of this new explanation were tested in four different experiments. In Experiment 1, a new illusion, the tilting of an occluded continuation of an oblique line, was predicted and achieved. In Experiments 2 and 3, perceived nearness of the occluding entity was manipulated via texture density variations and the predicted misalignment variations were confirmed by using a between-subjects and within-subjects designs, respectively. In Experiment 4, tilting of the occluded segment of the transversal was found to vary in the predicted direction as a result of being accompanied by the same texture cues used in Experiments 2 and 3.