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Abstract

Os judged the slants of a rectangle and three trapezoids, with complete and broken outlines, exposed under reduced viewing conditions at slants of 10°, 25°, 40°. All forms were of the same height and area. The smallest projective angular convergence of the sides of the frontal-parallel trapezoids was larger than that of the rectangle at its greatest slant. The slant estimates of the monocular and binocular groups for the trapezoids differed significantly; those for the rectangle did not. Os distinguished effectively between the rectangle and the trapezoids but not among the trapezoids. Estimates for particular forms with complete and broken outlines did not differ significantly. The data were interpreted as limiting the contour perspective theory of slant perception and as demonstrating a subjective shape influence in accordance with either the Helmholtzian or the Gestaltist type of explanation.

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References

Clark

W. C.

, Smith

A. H.

, & Rabe

Retinal gradient of outline as a stimulus for slant. Canad. J. Psychol., 1955, 9, 247–253.

Clark

W. C

, Smith

A. H.

, & Rabe

The interaction of surface texture, outline gradient and ground in the perception of slant. Canad. J. Psychol., 1956, 10, 1–8. (a)

Clark

W. C

, Smith

A. H.

, & Rabe

Retinal gradients of outline distortion and binocular disparity as stimuli for slant. Canad. J. Psychol., 1956, 10, 77–81. (b)

Flock

H. R.

Three theoretical views of slant perception. Psychol. Bull., 1964, 62, 110–121.

Freeman

R. B.

Jr. , Ecological optics and visual slant. Psychol. Rev., 1965, 72, 501–504.

Freeman

R. B.

Jr. , Effect of size on visual slant. J. exp. Psychol., 1966, 71, 96–103.

Llndquist

E. F.

Design and analysis of experiments in psychology and education. New York: Houghton Mifflin, 1953.

Smith

A. H.

Gradients of outline convergence and distortion as stimuli for slant. Canad. J. Psychol., 1956, 10, 211–218.

Smith

A. H.

Delay of response in the perception of slant and shape. Canad. J. Psychol., 1964, 18, 235–244. (a)

10.

Smith

A. H.

Judgment of slant with constant outline convergence and variable surface texture gradient. Percept. mot. Skills, 1964, 18, 869–875. (b)

11.

Smith

A. H.

Relation of slant and shape judgments in reduced viewing. Canad. J. Psychol., 1964, 18, 224–234. (c)

12.

Smith

A. H.

Interaction of form and exposure time in the perception of slant. Percept. mot. Skills, 1965, 20, 481–490.

Phenomenal Slant as a Function of Ambiguity of Contour Perspective 1

Abstract

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References