Abstract

A new apparent motion phenomenon is described. It occurs when two flashing screens are observed binocularly, one screen for each eye, and the temporal phase between the flashes is suddenly changed. It appears as a low-contrast pattern of vertical stripes that move either to the left or right, depending on the phase of the lights. Changing the relative intensity of the screens alters the effect in a manner consistent with previous measurements on visual time delays.

© 1976 Optical Society of America

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References

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  1. J. R. Smythies, Br. J. Psychol. 50, 305 (1959).
    [Crossref] [PubMed]
  2. A. Remole, J. Opt. Soc. Am. 64, 1133 (1974).
    [Crossref] [PubMed]
  3. R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
    [Crossref] [PubMed]
  4. J. A. Wilson and S. M. Anstis, Am. J. Psychol. 83, 350 (1969).
    [Crossref]
  5. B. Julesz and B. White, Nature (London) 222, 639 (1969).
    [Crossref]
  6. A. Prestrude, Vision Res. 11, 351 (1971).
    [Crossref] [PubMed]
  7. B. J. Rogers and S. M. Anstis, Vision Res. 12, 909 (1972).
    [Crossref] [PubMed]

1975 (1)

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

1974 (1)

1972 (1)

B. J. Rogers and S. M. Anstis, Vision Res. 12, 909 (1972).
[Crossref] [PubMed]

1971 (1)

A. Prestrude, Vision Res. 11, 351 (1971).
[Crossref] [PubMed]

1969 (2)

J. A. Wilson and S. M. Anstis, Am. J. Psychol. 83, 350 (1969).
[Crossref]

B. Julesz and B. White, Nature (London) 222, 639 (1969).
[Crossref]

1959 (1)

J. R. Smythies, Br. J. Psychol. 50, 305 (1959).
[Crossref] [PubMed]

Anstis, S. M.

B. J. Rogers and S. M. Anstis, Vision Res. 12, 909 (1972).
[Crossref] [PubMed]

J. A. Wilson and S. M. Anstis, Am. J. Psychol. 83, 350 (1969).
[Crossref]

Cole, R. E.

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

Gamble, M.

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

Julesz, B.

B. Julesz and B. White, Nature (London) 222, 639 (1969).
[Crossref]

Prestrude, A.

A. Prestrude, Vision Res. 11, 351 (1971).
[Crossref] [PubMed]

Rayner, M. D.

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

Remole, A.

Rogers, B. J.

B. J. Rogers and S. M. Anstis, Vision Res. 12, 909 (1972).
[Crossref] [PubMed]

Smythies, J. R.

J. R. Smythies, Br. J. Psychol. 50, 305 (1959).
[Crossref] [PubMed]

White, B.

B. Julesz and B. White, Nature (London) 222, 639 (1969).
[Crossref]

Wilson, J. A.

J. A. Wilson and S. M. Anstis, Am. J. Psychol. 83, 350 (1969).
[Crossref]

Young, R. S. L.

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

Am. J. Psychol. (1)

J. A. Wilson and S. M. Anstis, Am. J. Psychol. 83, 350 (1969).
[Crossref]

Br. J. Psychol. (1)

J. R. Smythies, Br. J. Psychol. 50, 305 (1959).
[Crossref] [PubMed]

J. Opt. Soc. Am. (1)

Nature (London) (1)

B. Julesz and B. White, Nature (London) 222, 639 (1969).
[Crossref]

Vision Res. (3)

A. Prestrude, Vision Res. 11, 351 (1971).
[Crossref] [PubMed]

B. J. Rogers and S. M. Anstis, Vision Res. 12, 909 (1972).
[Crossref] [PubMed]

R. S. L. Young, R. E. Cole, M. Gamble, and M. D. Rayner, Vision Res. 15, 1291 (1975).
[Crossref] [PubMed]

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Figures (2)

FIG. 1
FIG. 1

The modulations on the left (L) and right (R) screens required for A (maximum motion) or B (no motion) when the screens have equal luminance. The arrows show the direction of perceived motion upon inversion of the right screen modulation.

FIG. 2
FIG. 2

The delay time induced by decreasing the luminance of one of the screens. I0 is the luminance of the other screen. Time advances of T/4 and T/8 were used with frequencies (1/T) from 10 to 20 Hz. Three different runs were taken, each one on a different day. Two were done on the right eye, one on the left. No attempt was made to measure the time delay as a function of state of adaptation of the eyes to the luminance levels.