Lovegrove W J, Bowling A, Badcock D, Blackwood M
Science. 1980 Oct;210(4468):439-40. doi: 10.1126/science.7433985.
Contrast thresholds for sine-wave gratings of spatial frequencies of 2, 4, 12, and 16 cycles per degree were determined for normal and disabled readers at a range of stimulus durations. Normal readers demonstrated monotonically decreasing sensitivity with increasing spatial frequency at exposure durations between 40 and 100 milliseconds. At exposure durations of 150 to 1000 milliseconds, they showed peak sensitivity at 4 cycles per degree. In comparison, disabled readers showed monotonically decreasing sensitivity with increasing spatial frequency at all stimulus durations. The difference in sensitivity pattern across spatial frequencies was greatest at stimulus durations approximately equal to fixation durations during reading.
在一系列刺激持续时间下，测定了正常读者和阅读障碍读者对每度2、4、12和16周空间频率的正弦波光栅的对比度阈值。正常读者在40至100毫秒的暴露持续时间内，随着空间频率的增加，敏感性呈单调下降。在150至1000毫秒的暴露持续时间内，他们在每度4周时表现出峰值敏感性。相比之下，阅读障碍读者在所有刺激持续时间下，随着空间频率的增加，敏感性呈单调下降。在大约等于阅读过程中注视持续时间的刺激持续时间下，不同空间频率的敏感性模式差异最大。
