FIGURE 1.

Computerized Corsi block tapping task (CBT). In each trial, nine blue squares are randomly placed on the screen as placeholders (A). In the encoding phase (B), some of the squares would change color from blue to yellow in a sequential manner and participants are asked to memorize the location and the sequence of such presentation. During the 5-s delay retention phase (C), participants perform the modified Luria manual sequencing task in the interference condition, vs. no manual task in the non-interference condition. Finally, in the recall phase (D), participants are to point out the squares that changed color in the correct locations either in a forward or backward manner.