Odd one out – a lot of odd-one-out games and challenges |Cognitive Train – ⚡ Cognitive Train

⚡ Quick Start

➤A grid of similar items appears — exactly one is different. Find and click it before time runs out.

➤Harder modes add rotation, mirroring, scaling, and brightness shifts — these are intentional!

Stimulus Type

Grid Size

Challenge Level

⚙ Advanced Settings

Color Difference (Δ)

Display Time

Show live stats during test

Trial 1 of 10

Choose the odd one out

Correct

0

Mistakes

0

Streak

0

Best

0

📊 Recent Sessions

📘 Detailed Instructions

How to Play:

Choose your settings (stimulus type, grid size, challenge level)
Click "Start Test" to begin a 10-trial session
A grid appears for the set display time — one item is different
Click the odd one before the timeout (~1 second after grid disappears)
You can also click during the display phase if you spot it early

Settings Explained:

Stimulus: Choose what type of difference to find (colors, kanji, emoji, etc.)
Grid Size: Larger grids = more items to search through
Challenge: Adds rotation, scaling, mirroring, and brightness variations
Color Difference (Δ): Only for color mode. Lower Δ = harder to spot
Display Time: How long the grid stays visible

Tips:

Start with larger Δ values and longer display times, then increase difficulty
Scan systematically — try row by row
For character modes, focus on stroke details and character shapes
Use "Show live stats" to track progress during the test