Figure 2.

A, An example trial from experiment 1. Observers encoded one, two, three, four, or six mushroom-like objects presented around the center fixation in a sample display and, after a brief blank delay, judged whether the probe color or shape at the center of the test display was present or absent in the sample display. B, An example trial from experiment 2. The trial was identical to that illustrated in A, except that the probe in the test display was a colored shape. Observers judged whether the color and shape conjunction of the probe was present or absent in the sample display.