scholarly journals The relation between apparent extent and alignment in the Poggendorff illusion: A response to “No evidence for apparent extent between parallels as the basis of the Poggendorff effect,” by Day, Jolly, and Duffy

1989 ◽  
Vol 46 (5) ◽  
pp. 501-504 ◽  
Author(s):  
Suzanne Greist-Bousquet ◽  
H. R. Schiffman ◽  
Richard Dorsett ◽  
Janet Davis
Keyword(s):  
Poggendorff Illusion ◽  
Poggendorff Effect

The Poggendorff Illusion: An Illusion of Linear Extent?

Perception ◽  
1981 ◽  
Vol 10 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Suzanne Greist-Bousquet ◽  
Harvey R Schiffman
Keyword(s):  
Poggendorff Illusion ◽  
Acute Angle ◽  
Obtuse Angle ◽  
Spatial Distortion ◽  
Standard Version ◽  
Lyer Illusion ◽  
Poggendorff Figure ◽  
Linear Extent ◽  
Poggendorff Effect ◽  
Intersection Points

In the standard version of the Poggendorff figure a transversal intersects two parallel verticals and the segment of the transversal between the two intersection points, A and B, is not shown. The two portions of the transversal outside the parallels then seem to be misaligned. Besides this illusion of direction, there is also an illusion of size, the distance AB being underestimated in the standard figure. The influence of configural components in determining this spatial distortion of the Poggendorff figure was examined by having subjects reproduce the inner oblique (at 45°) extent AB in variations of the figure. This distance was found to be underestimated in Poggendorff variations which contained parallel (vertical) components that formed an acute angle with AB; and the underestimation increased as the number of these components present in the figure increased. The distance AB was found not to be significantly distorted in figures which contained only those parallel (vertical) components that formed an obtuse angle with AB, yet their presence in the figure tended to counteract the underestimation. When the transversals were omitted, the underestimation was found to increase. The findings are interpreted in support of an explanation that reduces the Poggendorff effect to those factors which mediate the Müller-Lyer illusion.

The Corner Poggendorff

Perception ◽  
1988 ◽  
Vol 17 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Ernest Greene
Keyword(s):  
Relative Position ◽  
Poggendorff Illusion ◽  
Oblique Line ◽  
The Other ◽  
Line Segments ◽  
Poggendorff Effect

With the classic Poggendorff illusion a set of parallel ‘induction lines’ will cause a set of oblique line segments to look misaligned even though they are collinear. A different kind of misalignment can be produced by placing the induction lines so that they form a corner. Under these conditions the obliques will appear to be angled slightly, one relative to the other. The effects are small, but can be seen and reliably reported by a group of naive subjects. The influence of the induction lines drops sharply as their relative position is moved from parallel to orthogonal, but there is a small residual influence which may be called the corner Poggendorff effect.

EFFECTS OF FREE INSPECTION AND FIXATION ON THE MAGNITUDE OF THE POGGENDORFF ILLUSION

1966 ◽  
Vol 23 (2) ◽  
pp. 663-670 ◽  
Author(s):  
STANLEY NOVAK
Keyword(s):  
Poggendorff Illusion

Quantitative Study of the Poggendorff Illusion in School Children upon Presentation of 3D Images

2020 ◽  
Vol 46 (4) ◽  
pp. 366-372
Author(s):  
S. I. Rychkova ◽  
R. I. Sandimirov ◽  
L. V. Kosobutskaya
Keyword(s):  
Quantitative Study ◽  
School Children ◽  
Poggendorff Illusion ◽  
3D Images

The development of the Poggendorff illusion in typically developing children

2021 ◽  
Vol 206 ◽  
pp. 105095
Author(s):  
Philippe A. Chouinard ◽  
Kayla A. Royals ◽  
Oriane Landry
Keyword(s):  
Poggendorff Illusion ◽  
Typically Developing ◽  
Typically Developing Children

scholarly journals A new explanation for the Poggendorff illusion

1976 ◽  
Vol 20 (1) ◽  
pp. 29-32 ◽  
Author(s):  
Lucia Zanuttini
Keyword(s):  
Poggendorff Illusion

scholarly journals The role of apparent distance in the Poggendorff illusion

1976 ◽  
Vol 20 (4) ◽  
pp. 309-316 ◽  
Author(s):  
Alexander E. Wilson ◽  
Alexander W. Pressey
Keyword(s):  
Poggendorff Illusion ◽  
Apparent Distance

The Poggendorff Illusion with Subjective Contours

1977 ◽  
Vol 29 (2) ◽  
pp. 219-226 ◽  
Author(s):  
R. H. Day ◽  
R. G. Dickinson ◽  
M. K. Jory
Keyword(s):  
Poggendorff Illusion ◽  
Oblique Line ◽  
The Other ◽  
Misalignment Effect

Gregory (1972) has claimed that the Poggendorff misalignment effect occurs when the collinear obliques are separated by subjective rather than real contours. He used two figures to demonstrate this variant of the illusion. Two experiments to test the claim are reported. The first showed that apparent misalignment in one of the two original figures is no greater than that with two obliques alone (the oblique line effect), but misalignment in the other is greater than with two oblique lines and than with a control without subjective contours. The second experiment showed that apparent misalignment in the second figure was less than in two control figures without subjective contours. Since this reduced effect was probably due to the nature of the intersection between the oblique and a semi-circular element, the role of subjective contours remains unsettled.

The Optical-Geometrical Illusion “Corner Poggendorff” Re-Examined

1993 ◽  
Vol 76 (3_suppl) ◽  
pp. 1283-1286 ◽  
Author(s):  
Giovanni Bruno Vicario ◽  
Elena Zambianchi
Keyword(s):  
The Other ◽  
Geometrical Illusion ◽  
Parallel Path ◽  
Poggendorff Effect ◽  
General Conditions

In 1988 Greene noted, if a straight pair of obliques are drawn outside of two orthogonal lines, the segments appear to be angled slightly one relative to the other. This illusion, designated as “corner Poggendorff,” is different from the Poggendorff effect (the two obliques seem to lie on a parallel path). The results of the present experiments ( N = 76 students) suggest that the general conditions for the corner Poggendorff are similar to those for the Judd illusion.

Facilitating the Disappearance of Perceptual Error to the Poggendorff Illusion

1976 ◽  
Vol 19 (2) ◽  
pp. 193-199 ◽  
Author(s):  
Terry W. Mallenby
Keyword(s):  
Poggendorff Illusion ◽  
Perceptual Error
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