I've recently read a few articles pertaining to visual memory. Most of them (e.g. Bays et al., 2009 use the continuous color recall task where they ask participants to recall the color of an object by clicking on a color wheel. They use as measure of error the angular distance between the participant's response and the actual angle on the color wheel of the object's color.
Why use this dependent variable? In the industry, people use deltaE to determine the color difference between a product and a prototype.
Wouldn't it make more sense to also use deltaE as dependent variable in psychology? From what I've read, deltaE tries to be accurate for human color perception.