Hue-scaling functions are designed to characterize color appearance by assessing the relative strength of the red versus green and blue versus yellow opponent sensations comprising different hues. However, these judgments can be non-intuitive and may pose difficulties for measurement and analysis. We explored an alternative scaling method based on positioning a dial to represent the relative similarity or distance of each hue from the labeled positions for the opponent categories. The hue-scaling and hue-similarity rating methods were compared for 28 observers. Settings on both tasks were comparable though the similarity ratings showed less inter-observer variability and weaker categorical bias, suggesting that these categorical biases may reflect properties of the task rather than the percepts. Alternatively, properties that are concordant for the two paradigms provide evidence for characteristics that do reflect color appearance. Individual differences on both tasks suggest that color appearance depends on multiple, narrowly tuned color processes, which are inconsistent with conventional color-opponent theory.

中文翻译：

---

两种色相缩放方法的比较。

色相缩放功能旨在通过评估包含不同色相的红色，绿色，蓝色和黄色对手感觉的相对强度来表征颜色外观。但是，这些判断可能不直观，可能会给测量和分析带来困难。我们探索了一种基于定位刻度盘的替代缩放方法，以表示每种色调与对手类别的标记位置之间的相对相似度或距离。比较了28位观察者的色相缩放和色相相似度评定方法。尽管相似性等级显示出较少的观察者间差异和较弱的类别偏见，但两个任务的设置都是可比较的，这表明这些类别偏见可能反映了任务的属性，而不是感知。或者，这两个范式一致的特性为确实反映颜色外观的特性提供了证据。这两项任务的个体差异表明，颜色外观取决于多个经过严格调整的颜色过程，这与常规的颜色反对者理论不一致。