How to use it
- 1Focus on the red target during the introduction.
- 2Track its path after the distractors become visually identical.
- 3Make your choice before the reveal, then replay the seed or create a new one.
Visual attention testFollow
Follow
the ball.
Lock onto one red ball, watch it disappear into the crowd, then see if your eyes picked the right ending.
Balls & physics
Arena & colors
Timing
How Follow the Ball Attention Challenge
actually works.
Follow the Ball is a visual-attention test: one marked target becomes visually identical to a moving crowd, but its identity remains unchanged inside the program. The reveal checks the same object you were shown at the start.
Written by WeSimSims · Last meaningfully updated August 30, 2026
What the model demonstrates
A seeded motion system updates every ball while preserving a stable identifier for the target. Collisions and boundary responses alter paths, but the target is never swapped during the hidden phase.
Controls that matter
- Difficulty
- Preset combinations adjust crowd size, speed, timing, and visual pressure.
- Seed
- Replay the exact motion setup when you want a fair second attempt.
- Visual settings
- Trails, colors, reveal timing, and ball count change how demanding the task feels.
Experiments to try
- Replay one seed and compare your first and second attempts.
- Change only the number of distractors.
- Turn trails down and observe whether short-term motion memory becomes harder.
How to read an outcome
More distractors increase the chance of path confusion, especially after close crossings. Familiarity with one seed can improve performance even though the target itself never changes.
Limitations and accessibility
This is an entertainment challenge, not a medical, diagnostic, or validated cognitive assessment. Motion sensitivity varies; stop if the animation causes discomfort.
Animations may include rapid motion, flashes, synthesized sound, and dense particle effects. Pause playback, mute sound, or reduce graphics quality whenever needed.
Frequently asked questions
Does the target secretly switch?
No. The same internal object remains the target from introduction through reveal.
Is a high score a clinical result?
No. It should not be used to assess vision, attention, or health.