Fig. 1

Schematic design of Working Memory (WM) tasks. (A) In the analog recall paradigm with sequential bar presentation, participants were asked to memorize bar orientations of three consecutively presented bars. After a 1s delay interval they were asked to match the probe bar to the angle of one of the previously presented bars with the same color. (B) For the Delayed Match-to-Sample (DMS) task with checkerboard stimuli, participants were asked to memorize a checkerboard pattern and after a random delay interval of 0.5, 1, 2, 4 or 8 s they were asked to select the correct pattern previously presented between two different checkerboard patterns.