Fig. 2

Experimental procedure. Basically, experiments were designed to address level 1 to 3 settings. Each session consists of three blocks (pre-rest, task and post-rest). For exact instruction, a beep sound were provided during the task block.

Experimental procedure. Basically, experiments were designed to address level 1 to 3 settings. Each session consists of three blocks (pre-rest, task and post-rest). For exact instruction, a beep sound were provided during the task block.