Chimpanzees (Pan troglodytes) have been known for a long time to have color vision identical to humans (Grether in J Comp Psychol 29(2):167–177, 1940b; Jacobs et al. in Vis Res 36(16):2587–2594, 1996). With this study, we wonder if chimpanzees, as humans, show preferences for some colors rather than others. During a first range of experiments, we test their ability to discriminate all the colors from our set, through easy matching-to-sample tasks. The seven chimpanzees that participate in this first test show the results we can expect from chimpanzees with normal color vision. Then, six of them are tested for preferences. This range of experiments results in the existence of consistent tendencies across all the trials and situations, as chimpanzees would mostly first choose some particular colors, and conversely choose last different colors. Although the results for color discrimination are identical for all the seven chimpanzees, preference tests demonstrate four different tendencies. This study is the first step toward broader experiments, including more chimpanzee subjects, but also different species, with the only requirement of being trained to the basic use of a touch panel interface.

中文翻译：

---

黑猩猩（Pan troglodytes）的颜色辨别力和颜色偏好

长期以来，黑猩猩（Pan troglodytes）的色觉与人类相同（Grether in J Comp Psychol 29(2):167–177, 1940b；Jacobs et al. in Vis Res 36(16):2587– 2594, 1996)。通过这项研究，我们想知道黑猩猩作为人类是否更喜欢某些颜色而不是其他颜色。在第一轮实验中，我们通过简单的样本匹配任务来测试它们从我们的集合中区分所有颜色的能力。参与第一次测试的七只黑猩猩展示了我们可以从具有正常色觉的黑猩猩身上得到的结果。然后，对其中的六个进行偏好测试。这一系列实验导致在所有试验和情况下都存在一致的趋势，因为黑猩猩大多会首先选择某些特定的颜色，然后反过来选择最后的不同颜色。尽管所有七只黑猩猩的颜色辨别结果都相同，但偏好测试显示出四种不同的倾向。这项研究是迈向更广泛实验的第一步，包括更多的黑猩猩受试者，但也包括不同的物种，唯一的要求是接受触摸屏界面的基本使用培训。