Geometrical Factors in Illusions of Direction

Maheux, Magloire; Townsend, John C.; Gresock, Clement J.

doi:10.2307/1419941

Cited by 11 publications

(5 citation statements)

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“…Turning to the RRA tendency we regard this as orientational contrast which over certain limits will vary in the amount induced in one part of the figure by the other, according to the disparity in the number of signals of the two different orientations given by the two different parts. Thus, lengthening the transversals or increasing their density will increase the Zollner illusion (Maheux et al, 1960;Wallace & Crampin, 1969) whilst decreasing the proximity of the two parts of the figure to each other will decrease it (Wallace & Crampin, 1969) ; making the two parts more equal with regard to line length will cause both to show the contrast effect (Hotopf & Ollerearnshaw, 19723); reversing the relative number of signals the two parts give will change the inducing part into the induced part, i.e. change the Zollner into the Poggendorff; lengthening the transversal in the Poggendorff will reduce the effect (Burmester, 1896); and reducing beyond a certain point the difference in orientation between the two parts will change a contrast into an assimilation effect (Imai, 1962;Wallace & Crampin, 1969;Bouma & Andriessen, 1970;Wallace & Moulden, 1973).…”

Section: Discussionmentioning

confidence: 99%

The Regression to Right Angles Tendency and the Poggendorff Illusion. Ii

Hotopf

OLLEREARNSHAW

1972

British J of Psychology

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The regression to right angles explanation of the Poggendorff illusion was tested by varying the distance apart of the parallels. The varying amount of illusion this produced was shown to be consistent with a constant angular distortion. When, however, the apparent angle of the transversal was also measured, this was not found to be sufficient to account for as much as half the illusion with a 30" transversal. It was shown also that the extra amount of illusion could not be accounted for by the Miiller-Lyer component of the Poggendorff illusion nor by any tendency to see the distance between the parallels as smaller than i t was.

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Section: Discussionmentioning

confidence: 99%

The Regression to Right Angles Tendency and the Poggendorff Illusion. Ii

Hotopf

OLLEREARNSHAW

1972

British J of Psychology

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“…For instance, ZoÈ llner illusion becomes greater when the number of inducing obliques is higher (Wallace & Crampin, 1969;Maheux, Townsend, & Gresock, 1960).…”

Section: Methodsmentioning

confidence: 99%

Effects of contextual and local factors on Ponzo illusion magnitude

Roncato

Parlangeli

Farfaneti

1998

Psychological Research

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Ponzo illusion has been explained by considering either just the inducing elements present in a restricted area of the visual ®eld, the same area in which the test elements are located, or the stimulus con®gu-ration as a whole in which even the most distal ®gural elements ± i.e., the external converging lines, here called`P onzo wedge'' ± play a crucial role. The two studies reported here aimed at showing that both global con®gurational characteristics and inducing elements locally interacting with the test stimuli can independently aect the illusory eect. This hypothesis was tested using stimuli in which graphic-inducing elements giving rise to a herringbone pattern (Coren & Girgus, 1978) were drawn in the same area of the test segments.Results of Exp. 1 con®rmed the eect of the two factors. In particular, both factors proved to determine the illusion, since they induced illusory eects either in isolation or in the same/opposite direction. In Exp. 2 the relative weight of these two factors was evaluated in relation to the width of the angle of the inducing elements and to the distance of the test segments from the vertex. Results showed no linear relationships between the distance of the test segments from the external inducing elements and the weight of the Ponzo wedge factor.

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“…Wertykalne dłuższe linie wydają się odchylać od pionu w jedną i drugą stronę, podczas gdy na rysunku są w rzeczywistości równoległe. Złudzenie to można zaobserwować, kiedy kąt ostry między liniami krótszymi a linią dłuższą wynosi od 0 do 90 stopni, jednak największy efekt daje kąt od 10 do 30 stopni (Maheux, Townsend, Gresock, 1960). Iluzja działa silniej, kiedy obraz jest zrotowany o 45 stopni, niż kiedy długie linie są poziome lub pionowe.…”

Section: Charakterystyka Badanych Złudzeń Wzrokowychunclassified

Analiza podatności na złudzenia wzrokowe ze względu na zależność od pola i płeć

Bednarek¹,

Lukas²

2015

FoliaPsych

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Abstrakt. Poszukiwano odpowiedzi na pytania: czy osoby ulegające złudzeniom kształtu i kierunku ulegają także złudzeniom stałości przechylenia; czy osoby zależne w porównaniu z niezależnymi od pola w ujęciu Witkina charakteryzuje większa podatność na złudzenia; czy kobiety bardziej niż mężczyźni ulegają złudzeniom wzrokowym?Przeprowadzono dwa badania. W pierwszym wzięło udział 75 uczniów (M = 18,5; SD = 0,5), zaś w drugim 31 studentów psychologii (M = 20; SD = 0,5). Zastosowano Rod and Frame Test do badania iluzji Pręta i Ramy, komputerową symulację złudzeń wzrokowych: Zollnera, Poggendorffa, Ponzo, Ebbinghausa, Millera-Lyera oraz EFT Witkina do określania zależności od pola.Okazało się, że kobiety bardziej niż mężczyźni ulegają iluzji Pręta i Ramy, Poggendorffa i Zӧll-nera, natomiast zależność od pola nie różnicuje podatności na badane złudzenia. Związki pomiędzy iluzją Pręta i Ramy a pozostałymi złudzeniami uzyskano dla kąta odchylenia ramy od pionu o 15 stopni. Słowa kluczowe: złudzenia kształtu i kierunku, teoria stałości przechylenia, FDI, Zӧllner i Poggendorff, iluzja Pręta i Ramy.

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Geometrical Factors in Illusions of Direction

Cited by 11 publications

References 0 publications

The Regression to Right Angles Tendency and the Poggendorff Illusion. Ii

The Regression to Right Angles Tendency and the Poggendorff Illusion. Ii

Effects of contextual and local factors on Ponzo illusion magnitude

Analiza podatności na złudzenia wzrokowe ze względu na zależność od pola i płeć

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