Measure selective attention, sustained attention, visual scanning and precision
In this attention cancellation test, you must cross out every 3 and 8 as quickly and accurately as possible. This version uses a 3-minute timer and tracks speed, omissions, commission errors and a site score for progress.
Your score reflects both speed and accuracy. Higher scores usually mean you found more target numbers quickly and made fewer mistakes.
Repeated cancellation-style practice can support more systematic scanning, steadier concentration, and cleaner response control during repetitive visual work. It can also complement broader attention training with tasks such as Poppelreuter Table and Filtering Task.
Your results can be affected by fatigue, distractions, visual search strategy, and how consistently you work through the grid.
For better results, test in a quiet place, avoid distractions, and scan the grid in a consistent line-by-line pattern. Focus on accuracy first, then maintain a steady pace.
Cancellation tasks are widely used in attention research and neuropsychology because they combine target selection, scanning speed, and error monitoring in one compact format. They are also common in discussions of visuospatial neglect and rehabilitation. For open-access background, see this review of spatial neglect, a paper on cancellation-task severity measures, and our broader article on attention and distractions.
This version uses a 3-minute timer, which matches the common paper format used in 3/8 attention testing.
An omission means a 3 or 8 was present on the board but you did not cross it out before time ran out.
A wrong mark means you crossed out a digit that was not 3 or 8.
For related attention tasks, try Precision Click Test, Stroop, or browse the blog for more articles on attention, distraction, and cognitive self-tracking.
For training and self-tracking only; not a clinical or diagnostic instrument.