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  1. R. Lythgoe and K. Tansley, Proc. Roy. Soc. 105B, 60 (1929).
  2. S. Kravkov, Acta Ophthal. (Kbh) 16, 375 (1938).
    [Crossref]
  3. A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
    [Crossref] [PubMed]
  4. F. Allen, Phys. Rev. 2, 257 (1900).
  5. R. Peckham and W. Arner, J. Opt. Soc. Am. 42, 621 (1952).
    [Crossref] [PubMed]
  6. S. Shikano, Nippon Ganka Gakkai (Acta Soc. Ophthal. Japonica 55, 319 (1951).
  7. K. Akos and M. Akos, The Critical Flicker Frequency Series Effect. (Akademiai Kiado, Budapest, 1966).
  8. D. Norren and P. Padmos, Vision Res. 14, 677 (1974).
    [Crossref] [PubMed]
  9. M. Alpern and S. Sugiyama, J. Opt. Soc. Am. 51, 1379 (1961).
    [Crossref]
  10. R. Smith, Vision Res. 10, 275 (1970).
    [Crossref] [PubMed]
  11. T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
    [Crossref] [PubMed]
  12. H. Baker, J. Opt. Soc. Am. 43, 798 (1953).
    [Crossref] [PubMed]
  13. Each test flash of the threshold stimulus had a duration of 250 ms, well beyond the critical duration for Bloch’s law. At rates near fusion, the apparent brightness of the flickering stimulus was reduced to the Talbot level appropriate to the 0.5 duty cycle of flicker. The increase in luminance provided the necessary compensation factor of 2, keeping the flickering stimulus just visible.
  14. W. Rushton, Photochem Photobiol. 3, 561 (1964).
    [Crossref]
  15. S. Hecht and E. Smith, J. Gen. Physiol. 19, 979 (1936).
  16. V. Lloyd and C. Landis, J. Opt. Soc. Am. 50, 332 (1960).
    [Crossref] [PubMed]

1975 (1)

T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
[Crossref] [PubMed]

1974 (1)

D. Norren and P. Padmos, Vision Res. 14, 677 (1974).
[Crossref] [PubMed]

1970 (1)

R. Smith, Vision Res. 10, 275 (1970).
[Crossref] [PubMed]

1964 (1)

W. Rushton, Photochem Photobiol. 3, 561 (1964).
[Crossref]

1961 (1)

1960 (1)

1958 (1)

A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
[Crossref] [PubMed]

1953 (1)

1952 (1)

1951 (1)

S. Shikano, Nippon Ganka Gakkai (Acta Soc. Ophthal. Japonica 55, 319 (1951).

1938 (1)

S. Kravkov, Acta Ophthal. (Kbh) 16, 375 (1938).
[Crossref]

1936 (1)

S. Hecht and E. Smith, J. Gen. Physiol. 19, 979 (1936).

1929 (1)

R. Lythgoe and K. Tansley, Proc. Roy. Soc. 105B, 60 (1929).

1900 (1)

F. Allen, Phys. Rev. 2, 257 (1900).

Akos, K.

K. Akos and M. Akos, The Critical Flicker Frequency Series Effect. (Akademiai Kiado, Budapest, 1966).

Akos, M.

K. Akos and M. Akos, The Critical Flicker Frequency Series Effect. (Akademiai Kiado, Budapest, 1966).

Allen, F.

F. Allen, Phys. Rev. 2, 257 (1900).

Alpern, M.

Arner, W.

Baker, H.

Dondero, A.

A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
[Crossref] [PubMed]

Hecht, S.

S. Hecht and E. Smith, J. Gen. Physiol. 19, 979 (1936).

Hofstaetter, P.

A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
[Crossref] [PubMed]

Kravkov, S.

S. Kravkov, Acta Ophthal. (Kbh) 16, 375 (1938).
[Crossref]

Landis, C.

Lloyd, V.

Lythgoe, R.

R. Lythgoe and K. Tansley, Proc. Roy. Soc. 105B, 60 (1929).

Nelson, T.

T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
[Crossref] [PubMed]

Nilsson, T.

T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
[Crossref] [PubMed]

Norren, D.

D. Norren and P. Padmos, Vision Res. 14, 677 (1974).
[Crossref] [PubMed]

O’Connor, J.

A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
[Crossref] [PubMed]

Padmos, P.

D. Norren and P. Padmos, Vision Res. 14, 677 (1974).
[Crossref] [PubMed]

Peckham, R.

Richmond, C.

T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
[Crossref] [PubMed]

Rushton, W.

W. Rushton, Photochem Photobiol. 3, 561 (1964).
[Crossref]

Shikano, S.

S. Shikano, Nippon Ganka Gakkai (Acta Soc. Ophthal. Japonica 55, 319 (1951).

Smith, E.

S. Hecht and E. Smith, J. Gen. Physiol. 19, 979 (1936).

Smith, R.

R. Smith, Vision Res. 10, 275 (1970).
[Crossref] [PubMed]

Sugiyama, S.

Tansley, K.

R. Lythgoe and K. Tansley, Proc. Roy. Soc. 105B, 60 (1929).

Acta Ophthal. (Kbh) (1)

S. Kravkov, Acta Ophthal. (Kbh) 16, 375 (1938).
[Crossref]

J. Gen. Physiol. (1)

S. Hecht and E. Smith, J. Gen. Physiol. 19, 979 (1936).

J. Gen. Psychol. (1)

A. Dondero, P. Hofstaetter, and J. O’Connor, J. Gen. Psychol. 58, 11 (1958).
[Crossref] [PubMed]

J. Opt. Soc. Am. (4)

Nippon Ganka Gakkai (Acta Soc. Ophthal. Japonica (1)

S. Shikano, Nippon Ganka Gakkai (Acta Soc. Ophthal. Japonica 55, 319 (1951).

Photochem Photobiol. (1)

W. Rushton, Photochem Photobiol. 3, 561 (1964).
[Crossref]

Phys. Rev. (1)

F. Allen, Phys. Rev. 2, 257 (1900).

Proc. Roy. Soc. (1)

R. Lythgoe and K. Tansley, Proc. Roy. Soc. 105B, 60 (1929).

Vision Res. (3)

D. Norren and P. Padmos, Vision Res. 14, 677 (1974).
[Crossref] [PubMed]

R. Smith, Vision Res. 10, 275 (1970).
[Crossref] [PubMed]

T. Nilsson, C. Richmond, and T. Nelson, Vision Res. 15, 621 (1975).
[Crossref] [PubMed]

Other (2)

K. Akos and M. Akos, The Critical Flicker Frequency Series Effect. (Akademiai Kiado, Budapest, 1966).

Each test flash of the threshold stimulus had a duration of 250 ms, well beyond the critical duration for Bloch’s law. At rates near fusion, the apparent brightness of the flickering stimulus was reduced to the Talbot level appropriate to the 0.5 duty cycle of flicker. The increase in luminance provided the necessary compensation factor of 2, keeping the flickering stimulus just visible.

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Figures (2)

FIG. 1
FIG. 1

Log retinal illuminance (td) of CFF tests for subject KW, shown as a function of time in the dark (min). Each point plots the geometric mean of retinal illuminance for CFF tests made within particular time intervals, at the mean time of the subject’s fusion judgments. Each test of CFF was made at twice the luminance of the absolute threshold, and each judgment of fusion was achieved at about 10 s after the preceding luminance-threshold judgment. Different symbol shapes represent log retinal illuminance (td) of preceding light adaptation, Δ—Δ, 5.5; ○– – –○, 4.5; □—□, 3.5.

FIG. 2
FIG. 2

Critical flicker frequency (Hz) as a function of log retinal illuminance (td), for same data shown in Fig. 1. Each point plots the mean CFF for tests made within intervals of retinal illuminance. Vertical bars extend ± 1 estimated standard error of the mean. Different symbol shapes represent the same measures as in Fig. 1. The line drawn through the points was fitted by the method of least squares, and seems to describe the Ferry–Porter law.