DETERMINANTS OF MONOCULAR DEPTH CONTRAST

描述(改编自摘要)：许多神经疾病涉及 丧失对空间能力的感知，包括感知方向。是这样的 障碍通常涉及精细运动控制缺陷，涉及 以适合于施加的空间约束的方式操纵对象 各种任务(例如，寄信)。这样的赤字往往不是 双目立体视觉丧失；也就是说，他们基本上是单眼的。 本研究是研究单眼空间的初步尝试。 在音高维度上的感知。对音高的感知(对 水平轴)将利用单目形式的Werner (1937,1938)“双目深度对比”现象。以前，深度对比度 已经作为一种双目现象进行了调查。我最近找到了证据 用于单目观察条件下的深度对比度。拟议的研究 聚焦于单眼深度对比度(MDC)效应的三个可能基础 隔离：(1)视网膜视角信息；(2)视网膜定位 信息；(3)视网膜模糊信息。建议进行进一步的实验，以 检查“线索”组合之间的关系。第一个实验是 设计用于在以下条件下复制我们以前的MDC结果 目前的实验。将向学生呈现一个测试刺激，该刺激由2个 有2条发光感应线的发光测试线，否则 一片漆黑。深度对比度的存在将通过 视觉上感觉到的测试线的物理间距的移动的存在 由于感应线路节距的变化而产生的竖直(VPE)。这个 当刺激由一个测试和一个感应线组成时，MDC的存在 (在S的中间平面的同一或相反的两侧)将被用来 评估视网膜透视或定位提示的可能性 负责MDC。初步结果似乎表明，观点是 不是必须的，但视网膜方向结合另一个提示(如 视网膜模糊)可能是造成这种效果的原因。VPE作为一种 诱导刺激的物理音调的作用(在相同的 如刚才描述的用于测试视网膜透视的条件) 相对于匹罗卡品诱导的针孔，暗适应将被用来 评估视网膜模糊梯度产生MDC的程度。二 利用多对一的刺激线映射到其 视网膜投射被提出用来检查视网膜的关系 指向上述初步结果所指示的其他线索 在上面(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).