Dual N-Back Task
Track a moving position and letter, then mark when either matches two steps back.
Dual 2-back
For each stimulus, mark Position match if the square is in the same place as two trials ago. Mark Letter match if the letter repeats from two trials ago. Respond once per trial; this is a practice activity, not a clinical assessment.
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Tool guide
About Dual N-Back Task
Track a sequence of visual positions and spoken or displayed letters, then mark when either matches the item from N steps earlier. The game is a practice task, not proof of a general cognitive change.
How to use this tool
- 1Choose or start the displayed N-back level.
- 2Watch each position and letter; select the position or letter match controls when a stimulus repeats from N steps back.
- 3Complete the round and review correct responses and errors.
How the tool works
The task presents paired stimuli over time and compares each one with the corresponding stimulus N trials earlier. The page records hits, misses, and false alarms according to its matching rule. Short blank intervals separate presentations.
Worked real-world example
In a 2-back round, the current letter is a match if it is the same as the letter shown two trials before, not the immediately previous one.
Common scenarios and use cases
Practice attention to two streams of information or understand the basic n-back rule.
Important details and limitations
Scores depend on memory strategy, attention, practice, and the session length. The activity is not a clinical assessment and does not establish that a training program improves everyday cognition.
Check the output unit as well as the number. If the result will be reused in another calculation, retain full precision where possible and round only at the end. For measurements governed by a technical specification, use the standard and tolerance required by that document.
Frequently asked questions
What does the N mean?
It is how many trials back the current stimulus is compared.
Do I respond to every item?
Only mark the matching stream when it repeats at the specified lag.
Does a high score prove improved intelligence?
No. It records performance in this task only.