Martin F, Lovegrove W
Department of Psychology, University of Tasmania, Hobart, Australia.
Perception. 1987;16(2):215-21. doi: 10.1068/p160215.
Temporal contrast sensitivity for counterphase flicker was determined for specifically disabled and normal readers to investigate whether the two groups differ in the functioning of their transient systems. In experiment 1, temporal contrast sensitivity was measured over a range of temporal frequencies with a spatial frequency of 2 cycles deg-1. Disabled readers were less sensitive than the control subjects at all temporal frequencies. In experiment 2, temporal contrast sensitivity was measured at a temporal frequency of 20 Hz over a range of spatial frequencies. Disabled readers were less sensitive than the controls at all spatial frequencies, with the differences between the groups increasing as spatial frequency increased. Both these findings are interpreted as supporting the hypothesis of a transient-system deficit in the visual systems of disabled readers.
为了研究特定残疾读者和正常读者在瞬态系统功能上是否存在差异，我们测定了他们对反相闪烁的时间对比敏感度。在实验1中，在空间频率为2周/度的情况下，测量了一系列时间频率下的时间对比敏感度。在所有时间频率下，残疾读者的敏感度均低于对照组。在实验2中，在20Hz的时间频率下，测量了一系列空间频率下的时间对比敏感度。在所有空间频率下，残疾读者的敏感度均低于对照组，且随着空间频率的增加，两组之间的差异增大。这两个发现均被解释为支持残疾读者视觉系统中存在瞬态系统缺陷的假设。
