Next Article in Journal
Laser Doppler vibrometry of the middle ear in humans: derivation dependence, variability, and bilateral differences
Previous Article in Journal
Characteristics and management of acute heart failure patients in a single university hospital center
Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Three-part Oppel-Kundt illusory figure

Institute of Biology, Kaunas University of Medicine, Lithuania
*
Author to whom correspondence should be addressed.
Medicina 2009, 45(11), 871; https://doi.org/10.3390/medicina45110112
Received: 29 December 2008 / Accepted: 6 November 2009 / Published: 11 November 2009
The Oppel-Kundt illusion was examined in the psychophysical experiments with the classical two-part stimuli and modified three-part figures. The modified versions comprised either one filled medial interval and two empty flanking intervals or one empty space situated in between two fillings. The illusion was measured as a function of the number of filling elements in the referential parts of the figures. The curves obtained by two modified figures and by the original two-part stimulus were quite similar in shape, but the magnitudes of the illusions differed significantly. The figure with two filled intervals yielded about twice-stronger illusory effect than the contrasting figure with a single filled and two empty intervals. The two-part stimulus showed the illusion magnitudes in the midst. Our assumption suggests the illusory effect being related particularly to overestimations of the filled interval when compared with the empty interval displayed side-to-side. The unfilled interval might not contribute to the illusion.
Keywords: filled-space illusion; length matching filled-space illusion; length matching
MDPI and ACS Style

Bertulis, A.; Surkys, T.; Bulatov, A.; Gutauskas, A. Three-part Oppel-Kundt illusory figure. Medicina 2009, 45, 871.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop