Digit Span practice that shows what happened, not a mystery score

What the task actually asks you to do

Each trial has two phases. During presentation, one digit occupies the center of the board at a time. The keypad remains locked, so the sequence cannot be copied as it appears. During recall, the display changes to a question mark and the keypad unlocks. Enter every digit, edit if needed, and submit only when the response has exactly the required length.

Forward and Backward look similar on the surface but they are not treated as interchangeable. Forward requires immediate serial recall in the displayed order. Backward requires the same sequence to be reconstructed in reverse. Public research literature commonly distinguishes those two order-recall conditions, so DailyBrainArc keeps their results under different difficulty records rather than combining them into one universal capacity score.

How maximum span is calculated

Maximum span is the longest sequence length for which at least one attempted trial was recalled exactly. The result page also shows how many source trials were attempted and the percentage that were exact. Those values answer different questions: max span shows the highest successful length reached, while exact accuracy shows consistency across the trials you actually played.

The game does not convert max span into an IQ number, diagnostic flag, age norm, or population percentile. A browser practice session is affected by attention, interruptions, familiarity with the task, device input, and strategy. The honest output is the measured performance inside this exact game format.

Timing without pretending faster is always better

DailyBrainArc records two recall timing summaries. First-key latency measures how long it took from the recall prompt until the first entered digit. Submit time measures the time from the recall prompt until the complete response was submitted. Both are medians over eligible trials. They are secondary context, not a reason to rush and sacrifice exact order.

Because the digits themselves are presented on a fixed schedule inside each difficulty, presentation time is shown directly in the interface. Easy and Standard use 1000 ms per digit; Challenge uses 750 ms. There is no hidden adaptive speed change that makes two runs with the same difficulty secretly different.

Deterministic Practice and Fresh blocks

A Practice URL receives a local seed. That seed chooses one of the frozen project-local sources for the selected difficulty and applies a deterministic permutation of the ten digit labels. The same level plus the same seed reconstructs the same concrete block. Fresh block changes the seed and therefore gives you a different materialized block without requiring a server or account.

The frozen bank contains project-generated abstract sequences only. It is not a scraped clinical item list and it does not copy a competitor sequence bank. The answer is also not stored as a trusted flag: Forward is independently derived from the displayed order and Backward is independently derived by reversing that order.

How this differs from other DailyBrainArc memory games

Memory Grid is about remembering which spatial cells were shown. Verbal Memory is repeated word recognition. Dual N-Back is continuous updating and matching. Digit Span is ordered reconstruction of a short numerical sequence after presentation has ended. The overlap is the broad idea of memory; the actual response authority and failure modes are different.

If you want another memory mechanic after Digit Span, try Verbal Memory, Dual N-Back, or Memory Grid. If you want speed instead of recall span, use Reaction Time.

Practical repeat-play routine

1. Use Easy once if you are new to serial recall.
2. Use Standard for ordinary Backward practice.
3. Keep Chunk Cue off when you want a Clean comparison with your own prior runs.
4. Look first at exact accuracy and max span, then at timing.
5. Use Fresh block instead of memorizing one repeated sequence.
6. Use Daily only when you want the date-stable specialist block and streak.

Short, focused repetitions are more useful for this product than turning one run into a universal judgment about memory. Treat the measurements as a record of what happened in the task.

Frequently asked questions

Can a sequence start with zero?

Yes. Zero is a normal digit in the generated material and must be recalled if it appears first. The built-in keypad preserves leading zeroes because the response is stored as an ordered digit array rather than converted to an integer.

Can digits repeat?

Yes, the same digit can appear more than once in a sequence, but the generator excludes immediate adjacent repeats inside the frozen source. A repeat later in the same span is still possible and must be recalled in the correct position.

Why does the round sometimes stop before every source trial?

The two-attempt rule stops after two misses at the same span length. The source contains the full difficulty ladder, but the game does not force later spans after the stop condition has been reached.

Where are results stored?

Recent runs, Clean bests, and the specialist Daily history are stored locally in this browser. Clearing browser site data removes them. There is no clinical report or remote score database behind this preview.