Table 1. Forward memory span task before brain fitness program (an example).
Level Digits Words*
1 2-3-8 cat-airplane
2 1-9-7-2 shoes-cabbage-watch
3 8-7-3-2-4 colored paper-pencil-monkey-scissors
4 6-8-1-2-3-9 fishbowl-apartment-dyestuff-triangle-farmer
5 2-8-4-9-1-1-4 doll-classroom-spinach-pumpkin-goldfish-grape
6 5-8-6-4-3-8-9-7 sea-fox-spinach-pencil-goldfish-banana-pumpkin
7 7-4-9-6-8-5-3-1-8 doll-crayon-kettle-notebook-fox-mathematics-grape-sea
8 6-8-7-9-5-2-3-4-1-5 spinach-pig-doll-tiger-language-fisher-desk-scissors-potato
9 4-7-5-1-3-6-4-9-6-8-2 doll-crayon-kettle-lion-chair-gym-notebook-desk- mathematics-picture
10 7-6-1-8-2-5-7-6-2-1-9-4 doll-jumping rope-kettle-lion-chair-cucumber-ball-desk- mathematics-cup-doll
* used Korean language in the field.