Watch the highlighted ball among several bouncing balls. Count how many times it bounces off a wall in 10 seconds.
This test draws on the same territory as the famous "inattentional blindness" research popularized by the invisible gorilla study, where participants asked to count basketball passes completely failed to notice a person in a gorilla suit walking through the scene. Counting events for one specific object while visually similar distractor objects move nearby taxes sustained, selective visual attention - your brain has to actively suppress processing of the irrelevant balls while maintaining a precise count for the target one.
This exact skill - maintaining focus on one relevant stream of information while ignoring similar, distracting streams - is directly relevant to lifeguarding (watching one swimmer among many), air traffic control (tracking one aircraft on a busy radar), and driving (tracking a pedestrian's movement among general street activity). This free sustained attention test gives you an instant accuracy score across 5 progressively harder rounds.
The famous "invisible gorilla" study by Daniel Simons and Christopher Chabris demonstrated that even highly attentive observers can completely miss obvious events when focused on a demanding counting task. This bouncing ball counting test builds on that same principle in a more controlled, scoreable format, letting you measure your own selective attention filtering ability directly.
Don't try to track the target ball's exact position - focus on its color identity and let peripheral vision handle position.
Silently saying each bounce count as it happens helps anchor your count against distraction.
Actively trying to "not see" the other balls backfires - a soft, wide gaze with the target as your anchor works better.
Lifeguards and security personnel training their selective attention, psychology students studying inattentional blindness, and anyone interested in benchmarking their sustained attention under visual distraction will find this bouncing ball test a useful, research-grounded exercise.
It's the phenomenon where focused attention on one task causes you to completely miss other, sometimes obvious, visual events happening in the same scene - even things directly in your line of sight.
More distractor balls are added as rounds progress, increasing the visual clutter your attention has to filter out to keep an accurate count.
Yes, completely free with 5 rounds per attempt and instant percentile scoring.
It measures sustained visual attention and counting accuracy while tracking a moving target among distractors, similar to the classic selective-attention 'gorilla' experiments.
Your visual system has limited attentional 'slots' for tracking motion simultaneously, so accuracy drops as speed and the number of distractors increase.
Regular practice on tracking-based tasks, adequate sleep, and minimizing multitasking all help improve sustained visual attention over time.
Sustained-attention tasks like this are used in some research contexts, but this test is for personal benchmarking only and is not a clinical diagnostic tool.