The Corsi block-tapping test is a psychological test that assesses visuo-spatial short term working memory. It involves mimicking a sequence of up to nine identical spatially separated blocks. The sequence starts out simple, but becomes more complex until the subject's performance suffers. In this computerised version it is possible to simultaneously record the subject's EEG while performing the tasks, thus being able to analyse the subject's brain activity during the performance of cognitive tasks. This application includes both a "forward" (repeating the sequence in the same order in which it was presented) and a "backward" (repeating the sequence in reverse order) mode.