This test assesses visuo-spatial short term working memory, and provides information that can be useful to diagnose impairments related to associated cognitive processes.

The test, inspired in the Spatial Span of the third edition of the Wechsler Memory Scale and the Corsi Block-Tapping Test, requires users to repeat sequences of touches on blocks in the same or reverse order by touching them on the screen. The length of the sequence will increase as users repeat at least one of two sequences of the same length successfully. After the assessment, the test provides different measures, such as the length of the longest sequence, the number of correct answers, and the reaction time in forward and backward condition.