Experimental protocol and behavioral results.

<p><b><i>A.</i></b> An example trial. A trial type with two targets and two distractors (distractor condition) is shown. Participants had to indicate whether a red rectangle changed its orientation, while ignoring blue rectangles as distractors. Stimuli are not drawn to scale. <b><i>B.</i></b> Behavioral results. The behavioral VWM estimate <i>K</i> (open circles) and accuracy (filled circles) are shown as a function of trial types. Error bars reflect ±1 SEM.