Figure 5.

Experimental conditions for Experiment 2. The experiment included six different types of stimuli. The one element stimuli were only tested in the no-noise condition and acted mainly as a control. The other four stimuli were designed to share some of the aspects named in the figure while differing in others: number of elements, signal surface area, and overall surface area. They were presented only in the high-noise condition. Please note that these stimulus examples are shown only for illustration and do not exactly match the stimuli in the experiment. The experimental stimuli were carefully color-calibrated and shown on a gray background.