Reading rates with artificial central scotomata with and without spatial remapping of print.
Reading rates with artificial central scotomata with and without spatial remapping of print.
复制标题
使用或不使用印刷品空间重新映射的人工中心暗点的阅读率。
DOI：
10.1097/00006324-199502000-00009
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Loshin,DS
中科院分区：
文献类型：
--
作者：
Wensveen,JM;Bedell,HE;Loshin,DS
患有老年性黄斑变性（ARMD）的中央视野缺陷的人阅读速度非常慢。在这项研究中，口头阅读率被确定为不相关的单词序列的样本中的正常年轻人和老年人的模拟中心暗点2 0 4 0和8 0暗点是稳定在右眼的中央凹的眼位置的电子反馈，使用SRI双浦肯野眼跟踪器监测。通过在不同试验中增加字符空间的数量，在每次静止呈现后通过跳跃打印来确定阅读率。这个过程模仿了正常阅读时扫视和注视过程中产生的视网膜图像序列，但不需要受试者进行精确的眼球运动。在实验1中，产生最佳阅读率的字母大小被发现与暗点大小系统地增加。然而，最佳的阅读率下降或多或少的线性暗点的大小增加。实验2表明，最佳的阅读率获得基本相同的持续时间的文本介绍，无论暗点的大小。实验3研究了空间重映射的影响，其中打印模糊的暗点被拉伸电子重现在暗点边缘。与非重映射控制条件相比，空间重映射产生了小但显着的增加阅读率为4 0和8 0暗点。在实验中，年轻人的平均阅读速度比老年人快。总体而言，结果定义了不同大小的中央暗点的阅读率预计将如何降低，并表明打印的空间重新映射可能会改善ARMD患者的阅读率。
People with central field defects resulting from agerelated macular degeneration (ARMD) read very slowly. In this study, oral reading rates were determined for unrelated sequences of words in samples of normal young and old subjects with simulated central scotomata of 2 0 4 0 and 8 0 Scotomata were stabilized at the fovea of the right eye by electronic feedback of eye position, monitored using a SRI dual-Purkinje Eyetracker. Reading rates were determined by jumping print after each stationary presentation through an increasing number of character spaces on different trials. This procedure mimicked the sequence of retinal images produced during the saccades and fixations of normal reading, but without requiring subjects to make accurate eye movements. In Experiment 1, the letter size that yielded the optimal reading rate was found to increase systematically with scotoma size. However, the optimal reading rate decreased more or less linearly as the scotoma size increased. Experiment 2 showed that the optimal reading rate was obtained for essentially the same duration of text presentation, regardless of scotoma size. Experiment 3 investigated the effect of spatial remapping, in which print obscured by the scotoma was stretched electronically to reappear at the scotoma margin. Compared to a nonremapped control condition, spatial remapping produced small but significant increases in reading rate for both 4 0 and 8 0 scotomata. Across experiments, average reading rates were faster for the young than the old subjects. Overall, the results define how reading rate is expected to decrease for central scotomata of different sizes and suggest that spatial remapping of print may improve reading rates in patients with ARMD.