Can I compare different grid sizes?

Not directly; target count and cell size change.

Does completion time measure reading speed?

No. There is no reading or comprehension task.

Where is history stored?

Completed records stay in local browser storage.

Method explainer

What Is a Schulte Table?

A Schulte table is a grid of shuffled items selected in a required order. This site's version records browser completion time and wrong selections under configurable grid and mode settings.

The Ordered-Search Mechanism

Normal mode proceeds from 1 upward. Reverse mode proceeds from the largest number downward. Timed mode adds a limit while keeping ascending order. A wrong cell adds an error and leaves the expected number unchanged.

Random placement makes each board a different item arrangement. Larger boards contain more targets and, at the same viewport width, smaller cells. These differences mean raw times across grid sizes do not share a denominator.

What Completion Time and Errors Say

Completion time is the elapsed interval from start to the final required selection. Errors count incorrect cell choices. Together they describe this ordered-search run; a very fast time with several errors is not equivalent to an accurate completed run.

A Better Personal Comparison

Keep grid size, mode, browser zoom, device, pointer type, and viewing distance stable. Review several recent completed sessions and error counts. Expect layout familiarity and search strategy to change with repetition.

Do Not Convert the Time into a Reading or Health Claim

The task cannot establish wider peripheral vision, faster reading, better comprehension, intelligence, or neurological status. A standardized professional use would require a defined protocol and interpretation that this browser page does not provide.