Figure 1.

A, All stimuli used in this experiment. The same objects were used in the congruent, incongruent, and grayscale conditions. There were two exemplars of each object. Colors in the congruent and incongruent condition were matched. The abstract shapes were identical across color categories. B, The mean chromaticity coordinates for the 2° observer under D65 illumination for each color category (top) as well as the mean lightness of all colored stimuli used in this experiment (bottom). The colors were transformed into CIELUV space using the OptProp toolbox (Wagberg, 2020). C, An example sequence of the main task. Participants viewed each object for 450 ms. After each sequence, one object was displayed and participants had to indicate whether they had seen this object in the previous sequence or not.