Transfer of an induced preferred retinal locus of fixation to everyday life visual tasks
Transfer of an induced preferred retinal locus of fixation to everyday life visual tasks
复制标题
DOI：
10.1167/17.14.2
复制
发表时间：
2017-12-01
影响因子：
1.8
通讯作者：
Wahl, Siegfried
中科院分区：
文献类型：
--
作者：
Barraza-Bernal, Maria J.;Rifai, Katharina;Wahl, Siegfried
受试者在模拟中心暗点的情况下形成首选的视网膜注视点（PRL）。如果对刺激位置进行系统性重新定位，则PRL会在有利于刺激重新定位的位置出现。本研究探讨了在日常生活中，诱导的PRL是否转移到重要的视觉任务，即追踪眼动，标志阅读，文本阅读。15名视力正常的受试者参加了这项研究。为了开发PRL，所有受试者在先前的研究中经历了暗点模拟，其中五名受试者被训练在左半野开发PRL，五名不同的受试者在右半野开发PRL，其余五名受试者可以自然选择PRL位置。该PRL的位置用作基线。在中心暗点模拟下，被试完成了追踪任务、标志阅读任务和阅读-文本任务。此外，还研究了行为的保持。结果表明，PRL的位置转移到追求任务，并保持垂直位置的PRL的文本阅读任务。然而，当阅读标牌时，观察到PRL位置的功能驱动变化。此外，在数周和数月内观察到PRL位置的保留。这些结果表明，PRL位置可以被诱导，并可能进一步转移到日常生活中的视觉任务，而不妨碍功能驱动的PRL位置的变化。
Subjects develop a preferred retinal locus of fixation (PRL) under simulation of central scotoma. If systematic relocations are applied to the stimulus position, PRLs manifest at a location in favor of the stimulus relocation. The present study investigates whether the induced PRL is transferred to important visual tasks in daily life, namely pursuit eye movements, signage reading, and text reading. Fifteen subjects with normal sight participated in the study. To develop a PRL, all subjects underwent a scotoma simulation in a prior study, where five subjects were trained to develop the PRL in the left hemifield, five different subjects on the right hemifield, and the remaining five subjects could naturally chose the PRL location. The position of this PRL was used as baseline. Under central scotoma simulation, subjects performed a pursuit task, a signage reading task, and a reading- text task. In addition, retention of the behavior was also studied. Results showed that the PRL position was transferred to the pursuit task and that the vertical location of the PRL was maintained on the text reading task. However, when reading signage, a function- driven change in PRL location was observed. In addition, retention of the PRL position was observed over weeks and months. These results indicate that PRL positions can be induced and may further transferred to everyday life visual tasks, without hindering function- driven changes in PRL position.