Figure 1.

Task to measure precision of recall. ( A ) A sequence of four coloured oriented bars were presented sequentially. Any of the bars could be probed by colour of the response stimuli and participants were asked to adjust the orientation of the probed bar to the orientation of the bar with same colour (red in this example). ( B ) One-item working memory task. A rotating dial is used to orient the probe bar (surrounded by circle) to match the orientation of the probed bar presented following a delay. ( C ) Sensorimotor task. A rotating dial is used to orient the probe bar to match the orientation of the target bar presented above the probe and continuously on view.