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A novel visual illusion paradigm provides evidence for a general factor of illusion sensitivity and personality correlates.
Sci Rep
April 2023
School of Social Sciences, Nanyang Technological University, Singapore, Singapore.
Visual illusions are a gateway to understand how we construct our experience of reality. Unfortunately, important questions remain open, such as the hypothesis of a common factor underlying the sensitivity to different types of illusions, as well as of personality correlates of illusion sensitivity. In this study, we used a novel parametric framework for visual illusions to generate 10 different classic illusions (Delboeuf, Ebbinghaus, Rod and Frame, Vertical-Horizontal, Zöllner, White, Müller-Lyer, Ponzo, Poggendorff, Contrast) varying in strength, embedded in a perceptual discrimination task.
View Article and Find Full Text PDFThe role of line-orientation processing in the production of the Poggendorff illusion: A dual-task study.
Atten Percept Psychophys
August 2023
Department of Psychology and Counselling, School of Psychology and Public Health, La Trobe University, George Singer Building, Room 460, Bundoora Campus, Melbourne, Victoria, 3086, Australia.
Using a dual-task paradigm, the present investigation examined whether processes related to line orientation play a critical role in the production of the Poggendorff illusion. In Experiment 1, we assessed the magnitude of the Poggendorff illusion under three different task conditions. In the single-task condition, participants were asked to report how they perceive the alignment of transversal lines in the Poggendorff figure.
View Article and Find Full Text PDFReduced likelihood of the Poggendorff illusion in cerebellar strokes: a clinical and neuroimaging study.
Brain Commun
March 2023
Department of Neurology and Stroke Medicine, Graduate School of Medicine, Yokohama City University, Yokohama 236-0004, Japan.
This study aimed to test our hypothesis that the cerebellum plays an important role in the generation of the optical-geometric illusion known as the Poggendorff illusion, the mechanism of which has been explained by accumulated experience with natural scene geometry. A total of 79 participants, comprising 28 patients with isolated cerebellar stroke, 27 patients with isolated cerebral stroke and 24 healthy controls, performed Poggendorff illusion tasks and 2 different control tasks. We also investigated core brain regions underpinning changes in the experience of the illusion effect using multivariate lesion-symptom mapping.
View Article and Find Full Text PDFThe Poggendorff illusion in Ruben's Descent from the Cross in Antwerp: Does the illusion even matter?
Iperception
October 2022
Department of Psychology, University of Milan-Bicocca, Milano, Lombardia, Italy.
Two experiments are described, the purpose of which was to investigate the presence of a misalignment illusion caused by Poggendorff-like conditions in two paintings by Peter Paul Rubens, both depicting the , one located in Antwerp (Belgium), the other in Lille (France). The first shows a geometrical misalignment made by Rubens in a minor detail, which is considered proof that the artist observed the Poggendorff illusion. The second painting, instead, shows a perfect geometrical alignment in a similar detail.
View Article and Find Full Text PDFThe Effects of Adding Pictorial Depth Cues to the Poggendorff Illusion.
Vision (Basel)
July 2022
Department of Psychology, Counselling, & Therapy, La Trobe University, Melbourne 3086, Australia.
We tested if the misapplication of perceptual constancy mechanisms might explain the perceived misalignment of the oblique lines in the Poggendorff illusion. Specifically, whether these mechanisms might treat the rectangle in the middle portion of the Poggendorff stimulus as an occluder in front of one long line appearing on either side, causing an apparent decrease in the rectangle's width and an apparent increase in the misalignment of the oblique lines. The study aimed to examine these possibilities by examining the effects of adding pictorial depth cues.
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