Abstract

Inspection of a pattern of horizontal, vertical, or oblique lines differentially affects the visual acuity for test gratings as a function of their orientation. After a horizontal grating is viewed for 1 sec or longer, the resolution threshold for horizontal contours is greater than the threshold for the identification of vertical and obliquely oriented contours. Conversely, prolonged viewing of vertical contours raises the threshold for the identification of vertical lines above those for other orientations. Similar results are found following adapting exposures to left-and right-oblique contours. The differential masking effects are systematic functions of the duration of exposure to the light-and-dark adapting pattern.

© 1968 Optical Society of America

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References

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  1. J. L. Brown, J. Eng. Psychol. 3, 53 (1964); J. L. Brown, C. H. Graham, H. Leibowitz, and H. Ranken, J. Opt. Soc. Am. 43, 197 (1953); A. L. Diamond and A. S. Gilinsky, J. Exptl. Psychol. 50, 134 (1955).
    [CrossRef] [PubMed]
  2. R. W. Sekuler and L. Ganz, Science 139, 419 (1963).
    [CrossRef] [PubMed]
  3. C. McCollough, Science 149, 1115 (1965).
    [CrossRef] [PubMed]
  4. D. H. Hubel, J. Opt. Soc. Am. 53, 58 (1963); D. H. Hubel and T. N. Wiesel, J. Physiol. (London) 160, 106 (1962); D. H. Hubel and T. N. Wiesel, J. Neurophysiol. 28, 229 (1965).
    [CrossRef] [PubMed]

1965 (1)

C. McCollough, Science 149, 1115 (1965).
[CrossRef] [PubMed]

1964 (1)

J. L. Brown, J. Eng. Psychol. 3, 53 (1964); J. L. Brown, C. H. Graham, H. Leibowitz, and H. Ranken, J. Opt. Soc. Am. 43, 197 (1953); A. L. Diamond and A. S. Gilinsky, J. Exptl. Psychol. 50, 134 (1955).
[CrossRef] [PubMed]

1963 (2)

Brown, J. L.

J. L. Brown, J. Eng. Psychol. 3, 53 (1964); J. L. Brown, C. H. Graham, H. Leibowitz, and H. Ranken, J. Opt. Soc. Am. 43, 197 (1953); A. L. Diamond and A. S. Gilinsky, J. Exptl. Psychol. 50, 134 (1955).
[CrossRef] [PubMed]

Ganz, L.

R. W. Sekuler and L. Ganz, Science 139, 419 (1963).
[CrossRef] [PubMed]

Hubel, D. H.

McCollough, C.

C. McCollough, Science 149, 1115 (1965).
[CrossRef] [PubMed]

Sekuler, R. W.

R. W. Sekuler and L. Ganz, Science 139, 419 (1963).
[CrossRef] [PubMed]

J. Eng. Psychol. (1)

J. L. Brown, J. Eng. Psychol. 3, 53 (1964); J. L. Brown, C. H. Graham, H. Leibowitz, and H. Ranken, J. Opt. Soc. Am. 43, 197 (1953); A. L. Diamond and A. S. Gilinsky, J. Exptl. Psychol. 50, 134 (1955).
[CrossRef] [PubMed]

J. Opt. Soc. Am. (1)

Science (2)

R. W. Sekuler and L. Ganz, Science 139, 419 (1963).
[CrossRef] [PubMed]

C. McCollough, Science 149, 1115 (1965).
[CrossRef] [PubMed]

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Figures (6)

Fig. 1
Fig. 1

Relative frequency of detection of the horizontal acuity target following exposures of various durations to horizontal lines (squares) and to vertical lines (ovals). Each point is based on 100 randomized presentations of the horizontal test stimulus; observer, GK.

Fig. 2
Fig. 2

Relative frequency of detection of the vertical acuity target following exposures of various durations to horizontal lines (squares) and to vertical lines (ovals). Each point is based on 100 randomized presentations of the vertical test stimulus; observer, GK.

Fig. 3
Fig. 3

Acuity thresholds for the horizontal test orientation as a function of exposure time to adapting striate and nonstriate displays. Points are means for the four observers. Adaptation pattern with the same (horizontal) orientation as the test target ——; adaptation pattern 90° (vertical) to test target — ⋯ — ⋯—; nonstriate adaptation – – – –.

Fig. 4
Fig. 4

Acuity thresholds for the vertical test orientation as a function of exposure time to adapting striate and nonstriate displays. Points are means of the four observers. Adaptation pattern with the same (vertical) orientation as the test target ——; adaptation pattern 90° (horizontal) to test target —⋯ — ⋯ —; nonstriate adaptation – – – –.

Fig. 5
Fig. 5

Acuity thresholds for the right-oblique test orientation as a function of exposure time to adapting striate and nonstriate displays. Points are means of the four observers. Adaptation pattern with the same (right oblique) orientation as the test target ——; adaptation pattern 90° (left oblique) to test target — ⋯ — ⋯ —; nonstriate adaptation – – – –.

Fig. 6
Fig. 6

Acuity thresholds for the left-oblique test orientation as a function of exposure time to adapting striate and nonstriate displays. Points are means of the four observers. Adaptation pattern with the same (left oblique) orientation as the test target ——; adaptation pattern 90° (right oblique) to test target — ⋯ — ⋯ —; nonstriate adaptation – – – –.

Tables (1)

Tables Icon

Table I Duration thresholds (msec) required for identification of test orientation following exposures of various durations to adaptation patterns.