Brainground/N-Back

N-Back

A stream of letters, one at a time. Say “match” whenever the current letter is the same as the one two steps back. The purest test of working memory there is.

N-Back · 2-back
~3m · Brain · Lab: qEEG Mapping

Match two steps back

Letters appear one by one. Press Match whenever the letter on screen is the same as the letter that appeared two before it. Do nothing for everything else.

1
Watch the streame.g. K — H — K. That third K matches two back.
2
Press on a matchTap Match, or press M / Space, while the letter shows.
3
Stay honestGuessing hurts your score — respond only to real matches.
M matchSpace match
0
Trial
0
Hits
0
False alarms
Match the letter from 2 back
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0.0Peak Hrs / 6

Result

0%Accuracy
0/0Hits
0False alarms
Take the full ScanNext: SART →
What it measures

Working memory

N-Back forces you to continuously hold, update and compare information — the mental scratchpad behind reasoning, planning and focus. It's among the most sensitive markers of cognitive load and one of the first capacities to narrow when your peak hours are spent.

In the lab

qEEG Brain Mapping

In a Peak Circle programme, working memory is measured alongside quantitative EEG, so the behavioural score is anchored to the electrical signature of your attention networks.