Cerella J, Poon L W, Fozard J L
J Gerontol. 1982 Mar;37(2):197-202. doi: 10.1093/geronj/37.2.197.
Letter recognition was investigated in 16 young adults (mean age = 21) and in 16 older men (mean age =64) by exposing seven-letter strings for brief periods followed by a mask. Young adults were able to identify three letters at a rate of 27 msec per letter, a value which is typical of other reports. Any additional letters were identified at a much slower rate. In contrast, older adults were able to identify only two letters, at a rate of 35 msec per letter. Older men thus showed a decline in both the amount of and rate at which information was encoded from the icon within a fixation period. These findings have implications for experiments involving visual arrays.
通过短暂呈现七字母字符串并随后呈现掩蔽物，对16名年轻成年人（平均年龄 = 21岁）和16名老年男性（平均年龄 = 64岁）的字母识别能力进行了研究。年轻成年人能够以每字母27毫秒的速度识别三个字母，这一数值与其他报告中的典型值相符。任何额外的字母识别速度都要慢得多。相比之下，老年人只能识别两个字母，速度为每字母35毫秒。因此，老年男性在注视期内从图标中编码信息的数量和速度均有所下降。这些发现对涉及视觉阵列的实验具有启示意义。
