It Was a Yellow Light

2018 ◽  
Vol 59 (4) ◽  
pp. 814-815
Author(s):  
Sarah Audsley
Keyword(s):  
2021 ◽  
Vol 118 (18) ◽  
pp. 182102
Author(s):  
Xiaoyu Zhao ◽  
Bin Tang ◽  
Liyan Gong ◽  
Junchun Bai ◽  
Jiafeng Ping ◽  
...  

2016 ◽  
Vol 55 (21) ◽  
pp. 10990-10998 ◽  
Author(s):  
Jianyan Ding ◽  
Quansheng Wu ◽  
Yanyan Li ◽  
Qiang Long ◽  
Yichao Wang ◽  
...  

2001 ◽  
Vol 18 (1) ◽  
pp. 127-135 ◽  
Author(s):  
MARCEL J. SANKERALLI ◽  
KATHY T. MULLEN

It is widely accepted that human color vision is based on two types of cone-opponent mechanism, one differencing L and M cone types (loosely termed “red–green”), and the other differencing S with the L and M cones (loosely termed “blue–yellow”). The traditional view of the early processing of human color vision suggests that each of these cone-opponent mechanisms respond in a bipolar fashion to signal two opponent colors (red vs. green, blue vs. yellow). An alternative possibility is that each cone-opponent response, as well as the luminance response, is rectified, so producing separable signals for each pole (red, green, blue, yellow, light, and dark). In this study, we use psychophysical noise masking to determine whether the rectified model applies to detection by the postreceptoral mechanisms. We measured the contrast-detection thresholds of six test stimuli (red, green, blue, yellow, light, and dark), corresponding to the two poles of each of the three postreceptoral mechanisms. For each test, we determined whether noise presented to the cross pole had the same masking effect as noise presented to the same pole (e.g. comparing masking of luminance increments by luminance decrement noise (cross pole) and luminance increment noise (same pole)). To avoid stimulus cancellation, the test and mask were presented asynchronously in a “sandwich” arrangement (mask-test-mask). For the six test stimuli, we observed that noise masks presented to the cross pole did not raise the detection thresholds of the test, whereas noise presented to the same pole produced a substantial masking. This result suggests that each color signal (red, green, blue, and yellow) and luminance signal (light and dark) is subserved by a separable mechanism. We suggest that the cone-opponent and luminance mechanisms have similar physiological bases, since a functional separation of the processing of cone increments and cone decrements could underlie both the separation of the luminance system into ON and OFF pathways as well as the splitting of the cone-opponent mechanisms into separable color poles.


1971 ◽  
Vol 28 (2) ◽  
pp. 367-374 ◽  
Author(s):  
Stephen B. Kendall
Keyword(s):  

Three pigeons were trained in a situation where they responded on a FR schedule in the presence of a yellow light. Following the completion of each FR the key was darkened for either 30 sec. or 2 min. (S— period). A peck to the dark key produced one of two colors; green if the 30-sec. S— period was in effect; blue if the 2-min. S— period was in effect. The birds responded to produce these stimuli but showed a rate decrease when the two colors were no longer correlated with the duration of S —. One of the 3 subjects had probably formed a superstitious chain during training and the results from this subject were equivocal.


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