OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 46, Iss. 4 — Apr. 1, 1956
  • pp: 274–277

Spatial Effects in Foveal Brightness Discrimination

HAROLD W. HAKE and EMANUEL AVERBACH  »View Author Affiliations

JOSA, Vol. 46, Issue 4, pp. 274-277 (1956)

View Full Text Article

Acrobat PDF (578 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Differential sensitivity for luminance differences existing in two spatially separated homogeneous fields was measured under three viewing conditions. In the first the comparison fields were separated by darkness; in the second the fields were joined by a transition area in which luminance increased linearly from the value presented in the darker field to that presented in the lighter field. A third condition controlled for the decrease in size of the fields which occurred with increasing separation. In all viewing conditions the darker field was presented to the left and to the right of the lighter field equally often; and the observer's task was to detect the darker side of the display. Detection was significantly better with the gradient present than with the fields separated by darkness. The results are discussed in terms of the suggested ability of the visual system to utilize the distribution of light in an intervening gradient to emphasize the difference in the luminances of separated fields.

HAROLD W. HAKE and EMANUEL AVERBACH, "Spatial Effects in Foveal Brightness Discrimination," J. Opt. Soc. Am. 46, 274-277 (1956)

Sort:  Author  |  Journal  |  Reset


  1. J. R. Smith, J. Gen. Psychol. 14, 318 (1936).
  2. M. A. Bouman and G. van den Brink, J. Opt. Soc. Am. 42, 617 (1952).
  3. Leibowitz, Mote, and Thurlow, J. Exptl. Psychol. 46, 453 (1953).
  4. Adams, Chambliss, and Riopelle, J. Exptl. Psychol. 49, 428 (1955).
  5. E. G. Heinemann, J. Exptl. Psychol. 50, 89 (1955).
  6. A. L. Diamond, J. Exptl. Psychol. 50, 144 (1955).
  7. C. McCollough, J. Exptl. Psychol. 49, 141 (1955).
  8. S. S. H. Bartley, Psychol. Rev. 46, 337 (1939).
  9. V. L. Senders, Psychol. Bull. 45, 465 (1948).
  10. G. A. Korn and T. M. Korn, Electric analog computers (McGraw-Hill Book Comipany, Inc., New York, 1952), p. 258.
  11. D. M. Barger and R. G. Roush, "A velocity modulated raster display for brightness discrimination studies," WADC Technical Rept. 53-249, U. S. Air Force Wright-Patterson Air Force Base (August, 1953).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited