Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

The Perception of Movement Persistence in the Ganzfeld

Not Accessible

Your library or personal account may give you access

Abstract

The apparent persistence of seen movement in a homogeneous visual field (Ganzfeld) is described. The task required that the subject observe the movement of a single, black, spherical stimulus in an otherwise empty field and to report when its movement ceased. The time interval between real and apparent cessation of movement was defined as “time delay.” The hypothesis advanced states that the apparent speed of the stimulus in the Ganzfeld is dependent upon the square of its real velocity, its duration and its size. This may be expressed as t=r+(1/av2) where t=time delay, r=reaction time, v=velocity, and a=the constant of inverse proportionality. The data are discussed in terms of “contrast of velocity.” The notion here is that a stimulus traveling at high speed and for a relatively long duration produces a more definite perception of velocity than one traveling slowly and observed for a shorter period of time. Therefore, when the former stimulus suddenly is stopped, the resulting contrast of velocity is great and the response to it rapid, whereas when the latter stimulus is similarly stopped, the resulting contrast of velocity is slight and its perception therefore slower. The data were shown to support this hypothesis.

© 1961 Optical Society of America

Full Article  |  PDF Article
More Like This
Role of Involuntary Eye Movements in Stereoscopic Acuity*

George K. Shortess and John Krauskopf
J. Opt. Soc. Am. 51(5) 555-559 (1961)

On Some Aspects of Real and Apparent Visual Movement*

C. H. Graham
J. Opt. Soc. Am. 53(9) 1019-1025 (1963)

Effect of Reference Lines on the Discrimination of Movement*

H. Leibowitz
J. Opt. Soc. Am. 45(10) 829-830 (1955)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved