Hidden Target

Hidden Target is built on the visual search task, a classic measure of selective attention — how efficiently you scan a cluttered scene for the one thing that matters. When the target does not simply “pop out”, you have to inspect items more or less one at a time. Anne Treisman’s Feature Integration Theory explains why: some features are spotted instantly and in parallel, while others require focused attention to bind together, which slows the search as clutter grows.

Cognitive domain: Attention

A field of look-alikes appears with one odd item hidden among them. Find it and tap it as fast as you can — each one you find, the field grows more crowded. Count how many you can find in 45 seconds. A wrong tap costs a moment but does not end the round.

Your score is how many targets you find in 45 seconds. On the MindSprint scale, roughly 25 is top-tier — steady finds even as the grid fills up. Because the field keeps growing, holding a fast, systematic scan is what pushes the number higher.

• Sweep your eyes in a set pattern — rows or a spiral — instead of jumping around.
• Use peripheral vision to catch the odd shape rather than reading each item.
• Learn what visually “breaks the pattern” so it snaps out at you.
• Stay calm as the grid grows; panic makes you re-scan the same spots.

What does visual search measure?

Selective attention — how well you filter a cluttered scene to locate a specific target.

Why does it get harder with more items?

When a target does not pop out, search is roughly serial, so more items mean more to check.

Is it used in the real world?

Yes — it underlies attention research and real tasks like radiology reads and baggage screening.