SPATIAL AND NONSPATIAL FACTORS IN SELECTION FOR ACTION

描述：(改编自《调查者摘要》)：广泛的 文献表明，检测目标对象的速度和准确性 在其他对象(干扰物)的阵列中是位置的函数 目标和干扰对象及其视觉和语义特征 这些物品。对照受试者和患者的最新证据 额叶和顶叶病变表明反应因素(如是否 该任务需要按下按钮或目标触摸响应)还可以 严重影响这类任务的绩效。根据这样的数据， 除了来自生理学研究的发现，我们已经开发出一种 不同额顶加工模块作用的暂定模型 在位置编码和“为动作选择”中。这个模型预测了 空间、对象和响应因素在选择作为 每个拟议处理模块的完整性功能。一个 这项研究计划的主要目标是测试预测是否 该模型在知觉障碍患者的表现中得到了证实。 忽视、方向性运动障碍忽略和视性共济失调，其损害 假设会影响不同的模块。拟议中的实验 该计划将集中于有选择的达成任务，并将在一个 关于真实物体检测和抓取的一系列研究 与大多数传统实验室相比，与自然行为的相关性更大 视觉注意力的研究。除了对 理解正常和紊乱的知觉-运动加工，数据来自 这些研究有望提供与现实生活相关的证据 此类障碍患者的行为表现，因此， 评估和治疗的临床意义。

DESCRIPTION: (Adapted From The Investigator's Abstract): An extensive literature suggests that speed and accuracy of detection of a target object in an array of other objects (distractors) is a function of the locations of target and distractor objects and the visual and semantic characteristics of these objects. Recent evidence for control subjects and patients with frontal and parietal lesions suggests that response factors (such as whether the task requires a button press or target-touch response) may also critically influence performance on such tasks. On the basis of such data, as well as findings from physiological studies, we have developed a provisional model of the role of distinct fronto-parietal processing modules in location coding and "selection for action". This model predicts differing roles for spatial, object, and response factors in selection as a function of the integrity of each of the proposed processing modules. A major goal of this research program is to test whether the predictions of the model are borne out in the performance of patients with perceptual neglect, directional hypokinesic neglect, and optic ataxia, whose lesions are hypothesized to affect different modules. The proposed experimental program will center upon selective reaching tasks, and will culminate in a series of studies of real-object detection and prehension designed to have greater relevance to naturalistic action than do most traditional laboratory studies of visual attention. In addition to contributing to the understanding of normal and disordered percept-motor processing, data from these studies are expected to provide evidence bearing on the real-life action performance of patients with such disorders, and thus, to have clinical implications for assessment and treatment.