{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T06:24:54Z","timestamp":1777875894218,"version":"3.51.4"},"reference-count":75,"publisher":"SAGE Publications","issue":"8","license":[{"start":{"date-parts":[[1997,8,1]],"date-time":"1997-08-01T00:00:00Z","timestamp":870393600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Perception"],"published-print":{"date-parts":[[1997,8]]},"abstract":"<jats:p>How are binocular disparities encoded and represented in the human visual system? An \u2018encoding cube\u2019 diagram is introduced to visualise differences between competing models. To distinguish the models experimentally, the depth-increment-detection function (discriminating disparity d from d \u00b1 \u0394 d) was measured as a function of standing disparity ( d) with spatially filtered random-dot stereograms of different centre spatial frequencies. Stereothresholds degraded more quickly as standing disparity was increased with stimuli defined by high rather than low centre spatial frequency. This is consistent with a close correlation between the spatial scale of detection mechanisms and the disparities they process. It is shown that a simple model, where discrimination is limited by the noisy ratio of outputs of three disparity-selective mechanisms at each spatial scale, can account for the data. It is not necessary to invoke a population code for disparity to model the depth-increment-detection function.<\/jats:p>\n                  <jats:p>This type of encoding scheme implies insensitivity to large interocular phase differences. Might the system have developed a strategy to disambiguate or shift the matches made at fine scales with those made at the coarse scales at large standing disparities? In agreement with Rohaly and Wilson, no evidence was found that this is so. Such a scheme would predict that stereothresholds determined with targets composed of compounds of high and low frequency should be superior to those of either component alone. Although a small stereoacuity benefit was found at small disparities, the more striking result was that stereothresholds for compound-frequency targets were actually degraded at large standing disparities. The results argue against neural shifting of the matching range of fine scales by coarse-scale matches posited by certain stereo models.<\/jats:p>","DOI":"10.1068\/p260977","type":"journal-article","created":{"date-parts":[[2007,1,23]],"date-time":"2007-01-23T10:36:13Z","timestamp":1169548573000},"page":"977-994","source":"Crossref","is-referenced-by-count":22,"title":["Spatial Scale Interactions in Stereo Sensitivity and the Neural Representation of Binocular Disparity"],"prefix":"10.1177","volume":"26","author":[{"given":"Harvey S","family":"Smallman","sequence":"first","affiliation":[{"name":"Centre for Vision and Visual Cognition, Department of Psychology, University of Durham, Durham DH1 3LE, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Donald I 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