Kline D W, Scialfa C T, Lyman B J, Schieber F
Department of Psychology, University of Calgary, Canada.
Exp Aging Res. 1990 Spring-Summer;16(1-2):61-5. doi: 10.1080/07340669008251528.
This study compared young and elderly observers on the continuity of sinusoidal grating-pairs as a function of interstimulus interval (ISI) and spatial frequency (.5, 1.0, 2.0, 4.0, 8.0, and 12.0 c/deg). Consistent with prior research, the maximum ISI over which pattern continuity was maintained increased with spatial frequency. In addition, among older observers, grating continuity occurred at significantly longer ISI's at the two lowest spatial frequencies; no age difference was observed at the higher spatial frequencies. These results could not be attributed to an age difference in retinal illumination associated with pupillary miosis. However, they do indicate an age-related decline in detecting visual offset and are consistent with the hypothesis of a decline in the effectiveness of the transient visual channels.
本研究比较了年轻和年长观察者对正弦光栅对连续性的感知，该连续性是作为刺激间隔（ISI）和空间频率（0.5、1.0、2.0、4.0、8.0和12.0周/度）的函数。与先前的研究一致，保持图案连续性的最大ISI随空间频率增加。此外，在年长观察者中，在两个最低空间频率下，光栅连续性出现在明显更长的ISI时；在较高空间频率下未观察到年龄差异。这些结果不能归因于与瞳孔缩小相关的视网膜照明的年龄差异。然而，它们确实表明在检测视觉偏移方面存在与年龄相关的下降，并且与瞬态视觉通道有效性下降的假设一致。
