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Processin Speed Test (Symbol–Digit Matchin)

A key pairs symbols wi digits. Enter the digit for ilk symbol, as mony as ye can in the time. Free, nae sign-up.

Bi the Helibrain teamChecked bi Robert(Inglis), PhD candidate in biophysicsPit oot Last checked

Whit this test measures

Symbol–digit tasks are amang the maist widely uised measures o processin speed: hou quickly ye can tak in whit ye see, compare it wi a key an respond. A muckle review o ane sic test, the Symbol Digit Modalities Test, fand it reliable an sensitive eneuch tae be uised as a speed measure in medical research 1.

This page is oor ain gemme in the same faimily, wi oor ain symbols. It isnae that test, it disnae hae ony o its norms, an it cannae tell ye onything aboot yer health.

Hou the test works

  • A key at the tap pairs 9 symbols wi the digits 1 tae 9. The key chynges ilka run.
  • Ane symbol appears at a time. Tap its digit on the nummer pad or press the key; the neist symbol comes richt awa. Wrang answers are coontit.
  • 6 practice symbols wi feedback come first (ye can skip them), than 90 seconds. Leavin the page ends the run, acause the test is timed.

Hou tae read yer score

Yer score is the nummer o symbols matched richt in the time. We shaw yer average time per symbol an hou mony ye got wrang an aa; gaun faster uisually costs ye some accuracy. Ower the first few runs ye'll mind mair o the key an get faster, sae compare wi yer ain runs ance the scores settle. For a pure speed test athoot a key, try the reaction time test.

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Cite this page: Processin Speed Test (Symbol–Digit Matchin). Helibrain. 2026. https://helibrain.com/sco/symbol-digit-test. CC BY 4.0.

Common questions

How this test works

This test measures processing speed: how quickly you can look, compare and answer. A key at the top pairs 9 symbols with the digits 1 to 9, and the pairs change in every run. One symbol appears at a time, and you enter its digit as fast as you can. After 6 practice symbols you have 90 seconds. Your score is the number of symbols you matched correctly. Symbol and digit coding tasks have been part of psychology tests for decades.

Version 1 · Cite this test:

Helibrain (2026). Processing speed test, v1. https://helibrain.com/symbol-digit-test/methods

Full method →

Sources

  1. Benedict RHB, DeLuca J, Phillips G, LaRocca N, Hudson LD, Rudick R; Multiple Sclerosis Outcome Assessments Consortium (2017). Validity of the Symbol Digit Modalities Test as a cognition performance outcome measure for multiple sclerosis. Multiple Sclerosis Journal 23(5):721–733.

How we made this page: scrieved bi the Helibrain team fae the studies listed abuin, an checked bi Robert(Inglis) (PhD candidate in biophysics) on 11/3/2026. We update it when the soorces chynges.