Experimental timelines and stimuli.

<p>(<b>A</b>)<b>.</b> During the imagery task participants were cued to imagine a red or green Gabor pattern for 10 sec. Next they performed a letter discrimination task, followed by the binocular rivalry display. Luminance profile shows the background luminance dynamics during the imagery period in experiment 2. (<b>B</b>)<b>.</b> For the visual working memory task participants were presented with two Gabor patterns sequentially, and were then cued to remember only one. Following a retention period a test pattern was presented and participants were required to indicate its orientation in relation to the pattern held in memory. (<b>C</b>)<b>.</b> During the iconic memory task participants were presented with seven Gabor patterns, and after the inter-stimulus interval (ISI) cued to remember only one of the seven. In the test phase a rotated Gabor pattern was displayed in the cued location and participants had to indicate its orientation in relation to the pattern held in memory.