DETERMINANTS OF MONOCULAR DEPTH CONTRAST

描述（改编自摘要）：许多神经系统疾病涉及 丧失对空间能力的感知，包括感知方向。等 疾病通常涉及精细运动控制的缺陷， 操纵对象的方式适当的空间约束所施加的 各种任务（例如，寄一封信）。这种赤字往往不是 双目立体视觉的丧失;也就是说，他们基本上是单眼的。 本研究是对单目空间研究的初步尝试 音高维度的感知。音高的感知（倾斜度约为 水平轴）将使用Werner的单目形式进行研究 (1937，1938）“双眼深度对比”现象。以前，深度对比 已经被研究为双目现象。我最近发现了证据 用于在单眼观看条件下的深度对比。拟议研究 聚焦于单眼深度对比（MDC）效应的三种可能基础， 隔离：（1）视网膜透视信息;（2）视网膜定向 （3）视网膜模糊信息。提出了进一步的实验， 检查“线索”组合的关系。第一个实验是 旨在复制我们以前的MDC结果的条件下， 目前的实验。学生将看到一个测试刺激， 在有2条发光感应线的情况下，发光测试线，否则 一片漆黑深度对比的存在将由 视觉感知的测试线的物理间距存在变化 由于感应线的节距变化而产生的直立（VPE）。的 当刺激由一条测试线和一条感应线组成时，MDC的存在 （在S的中间平面的相同或相对侧）将用于 评估视网膜透视或方向线索被 负责MDC。初步结果似乎表明， 不需要，但是视网膜方向与另一个线索（例如， 视网膜模糊）可能是造成这种效果的原因。VPE作为一种 诱导刺激的物理音高的函数（在相同的情况下） 测试视网膜透视的条件）， 相对于匹罗卡品诱导的“针孔”瞳孔的暗适应将用于 评估视网膜模糊梯度产生MDC的程度。两 实验利用多对一映射的刺激线，以他们的 视网膜投影提出检查视网膜的关系， 上述初步结果表明， 上图（如模糊渐变）。

DESCRIPTION (Adapted from abstract): Many neurological disorders involve the loss of perceptions of spatial abilities, including perceived orientation. Such disorders will often involve deficits in fine motor control involved in manipulating objects in ways appropriate to the spatial constraints imposed by various tasks (e.g., posting a letter). Such deficits are often NOT the result of a loss in binocular stereo vision; that is, they are essentially monocular. The present research is a preliminary attempt to investigate monocular space perception in the pitch dimension. The perception of pitch (inclination about a horizontal axis) will be investigated utilizing a monocular form of Werner's (1937, 1938) "binocular depth contrast" phenomenon. Previously, depth contrast has been investigated as a binocular phenomenon. I have recently found evidence for depth contrast under monocular viewing conditions. The proposed research focuses on three possible bases of the monocular depth contrast (MDC) effect in isolation: (1) Retinal perspective information; (2) Retinal orientation information; (3) Retinal blur information. Further experiments are proposed to examine the relationship of combinations of 'cues'. The first experiment is designed to replicate our previous MDC result under the conditions of the present experiments. Ss will be presented with a test stimulus consisting of 2 luminous test lines in the presence of 2 luminous induction lines, in otherwise complete darkness. The existence of depth contrast will be assessed by the presence of a shift in the physical pitch of the test lines visually perceived as erect (VPE) produced by changes in the pitch of the induction lines. The presence of MDC when the stimulus consists of one test and one induction line (either on the same or opposite sides of the S's median plane) will be used to assess the possibility that the retinal perspective or orientation cue is responsible for MDC. Preliminary results seem to indicate that perspective is not necessary, but retinal orientation in combination with another cue (such as retinal blur) may be responsible for the effect. Comparison of VPE as a function of the physical pitch of the inducing stimulus (under the same conditions as just described to test retinal perspective) with a normally dark-adapted relative to a pilocarpine-induced 'pinhole' pupil will be used to assess the extent to which the gradient of retinal blur produces MDC. Two experiments utilizing the many-to-one mapping of stimulus lines to their retinal projections are proposed to examine the relationship of retinal orientation to the other cue indicated by the preliminary results mentioned above (such as a blur gradient).