Start with task completion
Record the grid size, total time, and errors. Finishing accurately gives you a baseline that can be repeated without assigning a population rank.
A useful result is accurate, recorded under known conditions, and comparable with your own earlier attempt. One universal cutoff cannot account for grid size or setup.
Record the grid size, total time, and errors. Finishing accurately gives you a baseline that can be repeated without assigning a population rank.
Note whether you used touch, mouse, or keyboard, along with display scale and screen size. A change in setup can be larger than the difference between two attempts.
Several accurate attempts in a similar range are easier to interpret than one unusually fast result. Use recent local history and avoid comparing different grid sizes.
Repeat the same size if errors are frequent. Select a larger grid only when you want a longer task, not because a site label says you must progress.
No. Grid size, accuracy, device, input method, display, and familiarity all affect the result.
Keep it in your history, but review errors beside time. It is not equivalent to an accurate attempt.
Compare several recent, accurate attempts made with the same grid and setup.