This exercise calls upon attention skills and working memory. The prefrontal area of the brain involves concentrating, attending to incoming information, and elaborating on thought. It uses the capacity of immediate repetition or mental manipulation of information. 

We use the same skills in paying attention when we take down short bursts of information, such as a name or phone number. We also use these skills when recalling information we just quickly received verbally. 

You can modify:

• The exercise mode (fixed number or progressive)
• The number of series (from 1 to 10)
• The number of items to memorize (from 2 to 9)
• The type of items (numbers, letters, or letter and numbers)
• The restitution order (same, reverse, numeric or alphabetical, or reverse numeric or alphabetical)
• The presentation mode (visual, audio, or both)

Over 3,400 unique exercise configurations and infinite data set depth.