circle in L*a*b* space. Face images were pictures of white males. For each subject, object images were randomly assigned to each of the three color difference conditions (24 degrees, 48 degree, 72 degree). Each object was then assigned two colors separated by the hue angle degree difference of their respective condition. To do so the colorspace was sub-selected to include 45 colors each separated by 8 degrees. Colors were then assigned to objects with the following constraints 1) within a condition, there was an even distribution of colors across thirds (120 degrees) of the colorspace, and 2) each color was only assigned once across all objects. Each colored object was then a unique face associate. Objects were
LOOKUP OF COLORSPACE INFO
Task
The experiment consisted of an associative learning task. Participants learned the object-face pairs through 8 rounds of iterative study and test. During a study block, the face and object appeared on screen side by side and subjects had 2.5 seconds to study the pairing. All 36 pairs were presented in a round. Next participants were tested on their color memory for each object. On each trial a studied face was presented along with its paired object. The object was presented in greyscale and subjects used a computer mouse to rotate