Abstract

The effects of a moving line of light on the luminance threshold of a stationary target in its path have been compared for continuous and interrupted movement with three luminances of the moving line (2.0 to 0.023 ft-L), four speeds (17° to 170°/sec), and four widths of interruption of movement about the target position (0.13° to 3.43°). For both the continuous and interrupted movement the target threshold generally varied (a) with the luminance of the line divided by its speed, and (b) with the temporal interval between the presentation of the target and the arrival of the moving line at the target position. At short temporal intervals the rise in threshold with increasing luminance of the line was much greater than at long intervals. Although there were no substantial changes in the slopes of the functions, the point of maximum threshold rise was a function of speed. Both inhibitory and facilitative effects were magnified with very small interruptions of movement but decreased with larger interruptions.

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  1. S. M. Luria and P. A. Kolers, J. Opt. Soc. Am. 52, 1320A (1962)
  2. G. A. Fry, Am. J. Physiol. 108, 701 (1934).
  3. H. Pieron, J. Psychol. 32, 1 (1935).
  4. B. H. Crawford, Proc. Roy. Soc. (London) 134B, 283 (1947).
  5. M. Alpern, J. Opt. Soc. Am. 43, 648 (1953).
  6. R. Boynton and G. Kandel, J. Opt. Soc. Am. 47, 275 (1957).
  7. W. Battersby and I. Wagman, J. Opt. Soc. Am. 49, 752 (1959).
  8. P. A. Kolers, Vision Res. 2, 277 (1962).
  9. J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).
  10. D. Hubel and T. Wiesel, J. Physiol. (London) 160, 106 (1962).
  11. H. Hartline and F. Ratliff, J. Gen. Physiol. 40, 357 (1957); 42, 1241 (1959).
  12. W. R. MacKavey, S. H. Bartley, and C. Casella, J. Opt. Soc. Am. 52, 85 (1962).
  13. M. Alpern and H. David, J. Gen. Physiol. 43, 109 (1959).
  14. Y. Legrand, Light, Colour and Vision (John Wiley & Sons, Inc., New York, 1957), p. 240.
  15. G. Fooks, E. Sweeney, and F. L. Dimmick, U. S. Naval Medical Research Laboratory Report No. 285 (June 1957).
  16. P. A. Kolers, Vision Res. 3, 191 (1963).

Alpern, M.

M. Alpern, J. Opt. Soc. Am. 43, 648 (1953).

M. Alpern and H. David, J. Gen. Physiol. 43, 109 (1959).

Bartley, S. H.

W. R. MacKavey, S. H. Bartley, and C. Casella, J. Opt. Soc. Am. 52, 85 (1962).

Battersby, W.

W. Battersby and I. Wagman, J. Opt. Soc. Am. 49, 752 (1959).

Boynton, R.

R. Boynton and G. Kandel, J. Opt. Soc. Am. 47, 275 (1957).

Casella, C.

W. R. MacKavey, S. H. Bartley, and C. Casella, J. Opt. Soc. Am. 52, 85 (1962).

Crawford, B. H.

B. H. Crawford, Proc. Roy. Soc. (London) 134B, 283 (1947).

David, H.

M. Alpern and H. David, J. Gen. Physiol. 43, 109 (1959).

Dimmick, F. L.

G. Fooks, E. Sweeney, and F. L. Dimmick, U. S. Naval Medical Research Laboratory Report No. 285 (June 1957).

Fooks, G.

G. Fooks, E. Sweeney, and F. L. Dimmick, U. S. Naval Medical Research Laboratory Report No. 285 (June 1957).

Fry, G. A.

G. A. Fry, Am. J. Physiol. 108, 701 (1934).

Hartline, H.

H. Hartline and F. Ratliff, J. Gen. Physiol. 40, 357 (1957); 42, 1241 (1959).

Hubel, D.

D. Hubel and T. Wiesel, J. Physiol. (London) 160, 106 (1962).

Kandel, G.

R. Boynton and G. Kandel, J. Opt. Soc. Am. 47, 275 (1957).

Kolers, P. A.

S. M. Luria and P. A. Kolers, J. Opt. Soc. Am. 52, 1320A (1962)

P. A. Kolers, Vision Res. 2, 277 (1962).

P. A. Kolers, Vision Res. 3, 191 (1963).

Legrand, Y.

Y. Legrand, Light, Colour and Vision (John Wiley & Sons, Inc., New York, 1957), p. 240.

Lettvin, J.

J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).

Luria, S. M.

S. M. Luria and P. A. Kolers, J. Opt. Soc. Am. 52, 1320A (1962)

MacKavey, W. R.

W. R. MacKavey, S. H. Bartley, and C. Casella, J. Opt. Soc. Am. 52, 85 (1962).

Maturana, H.

J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).

McCulloch, W.

J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).

Pieron, H.

H. Pieron, J. Psychol. 32, 1 (1935).

Pitts, W.

J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).

Ratliff, F.

H. Hartline and F. Ratliff, J. Gen. Physiol. 40, 357 (1957); 42, 1241 (1959).

Sweeney, E.

G. Fooks, E. Sweeney, and F. L. Dimmick, U. S. Naval Medical Research Laboratory Report No. 285 (June 1957).

Wagman, I.

W. Battersby and I. Wagman, J. Opt. Soc. Am. 49, 752 (1959).

Wiesel, T.

D. Hubel and T. Wiesel, J. Physiol. (London) 160, 106 (1962).

Other (16)

S. M. Luria and P. A. Kolers, J. Opt. Soc. Am. 52, 1320A (1962)

G. A. Fry, Am. J. Physiol. 108, 701 (1934).

H. Pieron, J. Psychol. 32, 1 (1935).

B. H. Crawford, Proc. Roy. Soc. (London) 134B, 283 (1947).

M. Alpern, J. Opt. Soc. Am. 43, 648 (1953).

R. Boynton and G. Kandel, J. Opt. Soc. Am. 47, 275 (1957).

W. Battersby and I. Wagman, J. Opt. Soc. Am. 49, 752 (1959).

P. A. Kolers, Vision Res. 2, 277 (1962).

J. Lettvin, H. Maturana, W. McCulloch, and W. Pitts, Proc. IRE 47, 1040 (1959).

D. Hubel and T. Wiesel, J. Physiol. (London) 160, 106 (1962).

H. Hartline and F. Ratliff, J. Gen. Physiol. 40, 357 (1957); 42, 1241 (1959).

W. R. MacKavey, S. H. Bartley, and C. Casella, J. Opt. Soc. Am. 52, 85 (1962).

M. Alpern and H. David, J. Gen. Physiol. 43, 109 (1959).

Y. Legrand, Light, Colour and Vision (John Wiley & Sons, Inc., New York, 1957), p. 240.

G. Fooks, E. Sweeney, and F. L. Dimmick, U. S. Naval Medical Research Laboratory Report No. 285 (June 1957).

P. A. Kolers, Vision Res. 3, 191 (1963).

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