In 2008 Susane's Jaeggi research has shown that regular practice with 2-Back Test improves your working memory and concentration, that leads to increase of your fluid intelligence. This APP will allow you to practise in a easy and entertaining way where you can adjust difficulty levels and informs you about your progress.

Options that user can customize:

* Value of N (1-back, 2-back...)
* Practise duration (60s, 90s, 120 s)
* Trial speed (1s, 2s, 3s)

The APP has been developed for mobile devices and tablets and texts are available in english, spanish and polish. To know more about n-back test visit the following link: http://en.wikipedia.org/wiki/N-back