Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans
A vernier offset is detected at once among straight lines, and reaction times are almost independent of the number of simultaneously presented stimuli (distractors), indicating parallel processing of vernier offsets. Reaction times for identifying a vernier offset to one side among verniers of...
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| Language: | en_US |
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2004
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| Online Access: | http://hdl.handle.net/1721.1/6527 |
| _version_ | 1811069765366579200 |
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| author | Fahle, Manfred |
| author_facet | Fahle, Manfred |
| author_sort | Fahle, Manfred |
| collection | MIT |
| description | A vernier offset is detected at once among straight lines, and reaction times are almost independent of the number of simultaneously presented stimuli (distractors), indicating parallel processing of vernier offsets. Reaction times for identifying a vernier offset to one side among verniers offset to the opposite side increase with the number of distractors, indicating serial processing. Even deviations below a photoreceptor diameter can be detected at once. The visual system thus attains positional accuracy below the photoreceptor diameter simultaneously at different positions. I conclude that deviation from straightness, or change of orientation, is detected in parallel over the visual field. Discontinuities or gradients in orientation may represent an elementary feature of vision. |
| first_indexed | 2024-09-23T08:15:41Z |
| id | mit-1721.1/6527 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:15:41Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/65272019-04-09T17:39:15Z Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans Fahle, Manfred A vernier offset is detected at once among straight lines, and reaction times are almost independent of the number of simultaneously presented stimuli (distractors), indicating parallel processing of vernier offsets. Reaction times for identifying a vernier offset to one side among verniers offset to the opposite side increase with the number of distractors, indicating serial processing. Even deviations below a photoreceptor diameter can be detected at once. The visual system thus attains positional accuracy below the photoreceptor diameter simultaneously at different positions. I conclude that deviation from straightness, or change of orientation, is detected in parallel over the visual field. Discontinuities or gradients in orientation may represent an elementary feature of vision. 2004-10-04T15:14:42Z 2004-10-04T15:14:42Z 1989-12-01 AIM-1210 http://hdl.handle.net/1721.1/6527 en_US AIM-1210 7091174 bytes 2783152 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | Fahle, Manfred Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title | Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title_full | Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title_fullStr | Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title_full_unstemmed | Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title_short | Parallel Computation of Vernier Offsets, Curvature and Chevrons in Humans |
| title_sort | parallel computation of vernier offsets curvature and chevrons in humans |
| url | http://hdl.handle.net/1721.1/6527 |
| work_keys_str_mv | AT fahlemanfred parallelcomputationofvernieroffsetscurvatureandchevronsinhumans |