Abstract

Accuracy of localization of the radial position of a single stimulus was determined for various luminance-exposure duration combinations. Localization accuracy, provided the stimulus is seen, is independent of luminance and duration, but varies with the radial position of the stimulus. The results are discussed in terms of events critical to localization accuracy and it is concluded that the magnitude of photochemical events in the end organs does not limit localization accuracy for supraliminal stimuli.

© 1955 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef] [PubMed]
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  6. M. Keller, J. Exptl. Psychol. 28, 407 (1941).
    [CrossRef]
  7. C. H. Graham and C. Cook, Am. J. Psychol. 49, 654 (1937).
    [CrossRef]
  8. J. I. Niven and R. H. Brown, J. Opt. Soc. Am. 34, 738 (1944).
    [CrossRef]
  9. R. H. Brown, (1954).
  10. W. S. Hunter and M. Sigler, J. Exptl. Psychol. 26, 160 (1940).
    [CrossRef]
  11. H. K. Hartline, J. Cellular Comp. Physiol. 5, 229 (1934).
    [CrossRef]
  12. C. H. Graham, Psychol. Rev. 57, 108 (1950).
    [CrossRef]
  13. H. Leibowitz, J. Opt. Soc. Am. 43, 902 (1953).
    [CrossRef] [PubMed]
  14. , Port Washington, New York; Special Devices Center, U. S. Navy (1953).

1953 (1)

1951 (1)

1950 (1)

C. H. Graham, Psychol. Rev. 57, 108 (1950).
[CrossRef]

1949 (1)

E. Baumgardt, Rev. opt. 28, 661 (1949).

1944 (1)

1941 (1)

M. Keller, J. Exptl. Psychol. 28, 407 (1941).
[CrossRef]

1940 (1)

W. S. Hunter and M. Sigler, J. Exptl. Psychol. 26, 160 (1940).
[CrossRef]

1938 (1)

C. H. Graham and E. H. Kemp, J. Gen. Physiol. 21, 635 (1938).

1937 (1)

C. H. Graham and C. Cook, Am. J. Psychol. 49, 654 (1937).
[CrossRef]

1936 (2)

C. H. Graham and R. Margaria, Am. J. Physiol. 113, 299 (1936).

H. W. Kara, J. Gen. Psychol. 14, 360 (1936).
[CrossRef]

1934 (1)

H. K. Hartline, J. Cellular Comp. Physiol. 5, 229 (1934).
[CrossRef]

Baumgardt, E.

E. Baumgardt, Rev. opt. 28, 661 (1949).

Brown, R. H.

Cook, C.

C. H. Graham and C. Cook, Am. J. Psychol. 49, 654 (1937).
[CrossRef]

Graham, C. H.

C. H. Graham, Psychol. Rev. 57, 108 (1950).
[CrossRef]

C. H. Graham and E. H. Kemp, J. Gen. Physiol. 21, 635 (1938).

C. H. Graham and C. Cook, Am. J. Psychol. 49, 654 (1937).
[CrossRef]

C. H. Graham and R. Margaria, Am. J. Physiol. 113, 299 (1936).

Hartline, H. K.

H. K. Hartline, J. Cellular Comp. Physiol. 5, 229 (1934).
[CrossRef]

Hunter, W. S.

W. S. Hunter and M. Sigler, J. Exptl. Psychol. 26, 160 (1940).
[CrossRef]

Kara, H. W.

H. W. Kara, J. Gen. Psychol. 14, 360 (1936).
[CrossRef]

Keller, M.

M. Keller, J. Exptl. Psychol. 28, 407 (1941).
[CrossRef]

Kemp, E. H.

C. H. Graham and E. H. Kemp, J. Gen. Physiol. 21, 635 (1938).

Leibowitz, H.

Long, G.

Margaria, R.

C. H. Graham and R. Margaria, Am. J. Physiol. 113, 299 (1936).

Niven, J. I.

Sigler, M.

W. S. Hunter and M. Sigler, J. Exptl. Psychol. 26, 160 (1940).
[CrossRef]

Am. J. Physiol. (1)

C. H. Graham and R. Margaria, Am. J. Physiol. 113, 299 (1936).

Am. J. Psychol. (1)

C. H. Graham and C. Cook, Am. J. Psychol. 49, 654 (1937).
[CrossRef]

J. Cellular Comp. Physiol. (1)

H. K. Hartline, J. Cellular Comp. Physiol. 5, 229 (1934).
[CrossRef]

J. Exptl. Psychol. (2)

M. Keller, J. Exptl. Psychol. 28, 407 (1941).
[CrossRef]

W. S. Hunter and M. Sigler, J. Exptl. Psychol. 26, 160 (1940).
[CrossRef]

J. Gen. Physiol. (1)

C. H. Graham and E. H. Kemp, J. Gen. Physiol. 21, 635 (1938).

J. Gen. Psychol. (1)

H. W. Kara, J. Gen. Psychol. 14, 360 (1936).
[CrossRef]

J. Opt. Soc. Am. (3)

Psychol. Rev. (1)

C. H. Graham, Psychol. Rev. 57, 108 (1950).
[CrossRef]

Rev. opt. (1)

E. Baumgardt, Rev. opt. 28, 661 (1949).

Other (2)

, Port Washington, New York; Special Devices Center, U. S. Navy (1953).

R. H. Brown, (1954).

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Figures (2)

Fig. 1
Fig. 1

Percent of stimuli reported (x) and mean localization error (•) as a function of log luminance for various durations of exposure.

Fig. 2
Fig. 2

Mean localization error in degrees of arc for various radial positions.

Tables (2)

Tables Icon

Table I Mean localization error in degrees of arc for single stimuli located 4.2 degrees from the center of the stimulus field presented for the indicated durations of exposure and luminance values. Each mean error is based on data from 72 equally spaced radial positions.

Tables Icon

Table II Percentage of stimuli reported for single stimuli located 4.2 degrees from the center of the stimulus field presented for the indicated durations of exposure and luminance values. Each percentage is based on data from 72 equally spaced radial positions.