Reverse Recall · Backward Digit Span Test
Digits flash one at a time. When they stop, type them back in reverse order — last digit first. Each round adds a digit until you slip.
How to play Reverse Recall
Digits appear one at a time on screen. When the sequence ends, type the digits in reverse order and press Enter. Get it right and the next round adds one more digit; one mistake ends the run, and your score is the longest reversed sequence you managed.
What it measures
Reverse Recall is the classic backward digit span task used in cognitive testing for over a century. Unlike forward span, you can't just replay the sequence — you have to hold the digits in mind while actively reordering them, which recruits the manipulation side of working memory rather than pure storage.
Honest note: Backward span is normally a couple of digits shorter than forward span — that's expected, not a bad day. Compare against your own best, not the internet's.
What's a good score?
Most adults manage 4–6 digits backwards; 7+ is strong. Forward span (try Number Memory) usually runs about two digits higher. The percentile we show is an estimate based on typical distributions, not a clinical norm.
FAQ
Why is backwards so much harder than forwards?
Reversing forces you to store and transform the sequence at the same time — a heavier working-memory load than simple rehearsal. A gap of about two digits between forward and backward span is completely normal.
Can I improve my span?
You'll improve at this task with practice — chunking digits helps. Honest caveat: research shows those gains mostly stay task-specific rather than transferring broadly.