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Flanker Task
Total Trials (20-160)
Difficulty
Easy (1500ms display)
Medium (1000ms display)
Hard (700ms display)
⚠️ Requires: Keyboard (not mobile-friendly)
Press
Z
if the
center arrow
points left (←), press
V
if it points right (→).
Ignore the surrounding arrows!
Press
Space
or
Esc
to pause/resume
Click here to start
Center ← =
Z
Center → =
V
Pause
Session Summary
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How to Use (click to expand)
⚠️ Keyboard Required:
This test uses Z and V keys (not mobile-friendly)
Click/tap the test area to begin.
You'll see 5 arrows:
← ← ← ← ←
or
→ → → → →
or mixed patterns.
Your task:
Respond only to the
center (middle) arrow
direction.
Press
Z
if the center arrow points left (←).
Press
V
if the center arrow points right (→).
Ignore the surrounding arrows!
They are distractors designed to test your focus.
Congruent trials:
All arrows point the same way (easier):
← ← ← ← ←
Incongruent trials:
Side arrows point opposite to the center (harder):
→ → ← → →
Press
Esc
or
Space
to pause/resume at any time.
The test measures sustained attention, interference control, and the Flanker Effect (RT difference between congruent and incongruent trials).
A smaller Flanker Effect indicates better cognitive control and the ability to ignore distractions.