Cognitive tests: Working memory test (n-back) [go to stats]

This is a variant of what is known as the "n-back task," a test useful for investigating working memory. **Try using the 2-back option first, then move higher up. This version was capped at 7-back, which should be _very_ difficult for most people. As some users have gotten used to it, it is now capped at n = 9.**