Belmore Suzanne C, Shevell Steven K
Psychology, The University of Chicago, 940 East 57th Street, Chicago, IL 60637, USA.
Vision Res. 2011 Feb 9;51(3):362-6. doi: 10.1016/j.visres.2010.11.011. Epub 2010 Dec 3.
Very-long-term (VLT) chromatic adaptation results from exposure to an altered chromatic environment for days or weeks. Color shifts from VLT adaptation are observed hours or days after leaving the altered environment. Short-term chromatic adaptation, on the other hand, results from exposure for a few minutes or less, with color shifts measured within seconds or a few minutes after the adapting light is extinguished; recovery to the pre-adapted state is complete in less than an hour. Here, both types of adaptation were combined. All adaptation was to reddish-appearing long-wavelength light. Shifts in unique yellow were measured following adaptation. Previous studies demonstrate shifts in unique yellow due to VLT chromatic adaptation, but shifts from short-term chromatic adaptation to comparable adapting light can be far greater than from VLT adaptation. The question considered here is whether the color shifts from VLT adaptation are cumulative with large shifts from short-term adaptation or, alternatively, does simultaneous short-term adaptation eliminate color shifts caused by VLT adaptation. The results show the color shifts from VLT and short-term adaptation together are cumulative, which indicates that both short-term and very-long-term chromatic adaptation affect color perception during natural viewing.
极长期（VLT）色适应是由于长时间（数天或数周）暴露于改变后的色彩环境而产生的。离开改变后的环境数小时或数天后，就能观察到VLT适应导致的颜色变化。另一方面，短期色适应是由于暴露几分钟或更短时间而产生的，在适应光熄灭后的几秒或几分钟内就能测量到颜色变化；在不到一小时的时间内就能完全恢复到适应前的状态。在此，将两种适应类型结合起来。所有适应都是针对呈现红色的长波长光。在适应后测量唯一黄色的变化。先前的研究表明，由于VLT色适应会导致唯一黄色发生变化，但与VLT适应相比，短期色适应对类似适应光产生的变化可能要大得多。这里要探讨的问题是，VLT适应导致的颜色变化是否会与短期适应产生的大变化累积在一起，或者，同时进行的短期适应是否会消除VLT适应引起的颜色变化。结果表明，VLT适应和短期适应共同导致的颜色变化是累积的，这表明短期和极长期色适应在自然观察过程中都会影响颜色感知。
