We have compared two explanations for poor peripheral binding. Binding is the ability to assign the correct features (e.g., color, direction of motion, orientation) to objects. Wu, Kanai, and Shimojo (Nature, 429(6989), 262, 2004) showed that subjects performed poorly on binding dot color with direction of motion in the periphery. Suzuki, Wolfe, Horowitz, and Noguchi (Vision Research, 82, 58–65, 2013) similarly showed that subjects had trouble binding color with line orientation in the periphery. These authors concluded that performance in the periphery was poor because binding is poor in the periphery. However, both studies used red and green stimuli. We tested an alternative hypothesis, that poor peripheral binding is in part due to poor peripheral red/green color vision. Eccentricity-dependent changes in visual processing cause peripheral red/green vision to be worse than foveal vision. In contrast, blue/yellow vision remains centrifugally more stable. We tested 9 subjects in a replication and extension of Suzuki and colleagues’ line orientation judgment, in red and green, and in blue and yellow. There were three central conditions: (1) red (or blue) all horizontal, green (or yellow) all vertical; (2) red (or blue) all vertical, green (or yellow) all horizontal; or (3) random pairing of color and orientation. In both the red/green and the blue/yellow color schemes, peripheral performance was influenced by central line orientation, replicating Suzuki and colleagues. However, the effect with blue/yellow lines was smaller, indicating that poor peripheral “binding,” as hypothesized by both Wu and colleagues and Suzuki and colleagues, is due in part to their use of red and green stimuli.

我们比较了两种较差的外周结合的解释。绑定是将正确的特征（例如颜色，运动方向，方向）分配给对象的能力。Wu，Kanai和Shimojo（Nature，429（6989），262，2004）表明，受试者在结合点颜色和周围运动方向方面表现不佳。铃木，沃尔夫，霍洛维茨和野口（Vision Research，82，58-65，2013）类似地表明，受试者在沿线方向绑定颜色时遇到困难。这些作者得出的结论是，外围的性能很差，因为外围的结合力很差。但是，两项研究都使用了红色和绿色刺激。我们测试了另一种假设，即不良的周边结合部分是由于不良的周边红色/绿色视觉所致。视力处理中与偏心率有关的变化会导致周围的红色/绿色视力比中央凹视力差。相比之下，蓝/黄视觉在离心方面保持更稳定。我们以Suzuki和同事的线方向判断的复制和扩展测试了9位受试者，分别用红色和绿色，蓝色和黄色进行了测试。存在三个中心条件：（1）红色（或蓝色）全部水平，绿色（或黄色）全部垂直；（2）红色（或蓝色）全部垂直，绿色（或黄色）全部水平；或（3）颜色和方向的随机配对。在红色/绿色和蓝色/黄色配色方案中，外围性能均受中心线方向的影响，从而复制了Suzuki及其同事。但是，蓝/黄线的影响较小，这表明Wu和他的同事以及Suzuki和他的同事都认为，较差的外围“绑定”部分是由于他们使用了红色和绿色的刺激。