Abstract

Increment and decrement contrast thresholds have been measured for stimuli 15 min to 4.3° diam and repeated durations of 20 to 1000 msec. The fixation point was 7° from the fovea. The increment threshold was consistently greater than decrement threshold.

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  1. H. B. Barlow, J. Physiol. (London) 136, 469 (1957).
  2. A. Rose, Proc. IRE 30, 293 (1942).
  3. A. Rose, J. Opt. Soc. Am. 38, 196 (1948).
  4. H. DeVries, Physica 10, 553 (1943).
  5. M. A. Bouman, J. Opt. Soc. Am. 40, 825 (1950).
  6. H. B. Barlow, J. Physiol. (London) 141, 337 (1958).
  7. H. B. Barlow, in Photophysiology, A. C. Giese, Ed. (Academic Press Inc.,)New York, 1964), Vol. 2, p. 163.
  8. H. B. Barlow, Cold Spring Harbor Symp. Quant. Biol. 30, 539 (1965).
  9. H. R. Blackwell, J. Opt. Soc. Am. 36, 624 (1946).
  10. R. M. Herrick, J. Comp. Physiol. Psychol. 49, 437 (1956).
  11. J. W. T. Walsh, Photometry (Constable, London, 1958), p. 315.
  12. H. K. Hartline, Cold Spring Harbor Symp. Quant. Biol. 3, 245 (1935).
  13. E. F. MacNichol, H. K. Hartline, Federation Proc. 7, 76 (1948).
  14. R. L. DeValois, in Contributions to Sensory Physiology, W. D. Neff, Ed. (Academic Press Inc., New York, 1965), Vol. 1, p. 137.

Barlow, H. B.

H. B. Barlow, J. Physiol. (London) 136, 469 (1957).

H. B. Barlow, J. Physiol. (London) 141, 337 (1958).

H. B. Barlow, in Photophysiology, A. C. Giese, Ed. (Academic Press Inc.,)New York, 1964), Vol. 2, p. 163.

H. B. Barlow, Cold Spring Harbor Symp. Quant. Biol. 30, 539 (1965).

Blackwell, H. R.

H. R. Blackwell, J. Opt. Soc. Am. 36, 624 (1946).

Bouman, M. A.

M. A. Bouman, J. Opt. Soc. Am. 40, 825 (1950).

DeValois, R. L.

R. L. DeValois, in Contributions to Sensory Physiology, W. D. Neff, Ed. (Academic Press Inc., New York, 1965), Vol. 1, p. 137.

DeVries, H.

H. DeVries, Physica 10, 553 (1943).

Hartline, H. K.

E. F. MacNichol, H. K. Hartline, Federation Proc. 7, 76 (1948).

H. K. Hartline, Cold Spring Harbor Symp. Quant. Biol. 3, 245 (1935).

Herrick, R. M.

R. M. Herrick, J. Comp. Physiol. Psychol. 49, 437 (1956).

MacNichol, E. F.

E. F. MacNichol, H. K. Hartline, Federation Proc. 7, 76 (1948).

Rose, A.

A. Rose, Proc. IRE 30, 293 (1942).

A. Rose, J. Opt. Soc. Am. 38, 196 (1948).

Walsh, J. W. T.

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 315.

Other

H. B. Barlow, J. Physiol. (London) 136, 469 (1957).

A. Rose, Proc. IRE 30, 293 (1942).

A. Rose, J. Opt. Soc. Am. 38, 196 (1948).

H. DeVries, Physica 10, 553 (1943).

M. A. Bouman, J. Opt. Soc. Am. 40, 825 (1950).

H. B. Barlow, J. Physiol. (London) 141, 337 (1958).

H. B. Barlow, in Photophysiology, A. C. Giese, Ed. (Academic Press Inc.,)New York, 1964), Vol. 2, p. 163.

H. B. Barlow, Cold Spring Harbor Symp. Quant. Biol. 30, 539 (1965).

H. R. Blackwell, J. Opt. Soc. Am. 36, 624 (1946).

R. M. Herrick, J. Comp. Physiol. Psychol. 49, 437 (1956).

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 315.

H. K. Hartline, Cold Spring Harbor Symp. Quant. Biol. 3, 245 (1935).

E. F. MacNichol, H. K. Hartline, Federation Proc. 7, 76 (1948).

R. L. DeValois, in Contributions to Sensory Physiology, W. D. Neff, Ed. (Academic Press Inc., New York, 1965), Vol. 1, p. 137.

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