CPT-Lite (Continuous Performance Test)
Sustained attention task measuring focus and reaction time variability
5-7 minExecutive Function
Instructions
Press the spacebar (or tap) ONLY when you see the letter X. Ignore all other letters. Maintain steady attention throughout the test.
Sustained Attention
CPT-Lite (X Task)
0% • 0/120
Press or tap only when you see the letter "X". Ignore all other letters.
- One letter appears every ~1.5 seconds. Stay steady.
- Use the spacebar on desktop or tap the screen on mobile.
- Timing uses
performance.now()for sub-ms precision.
No raw trials leave your device—only a short summary is saved locally.
About This Test
The CPT-Lite is a simplified version of the Continuous Performance Test, designed to measure sustained attention, vigilance, and reaction time. Letters will appear on screen - press the spacebar only when you see the letter 'X'.
Source: Based on Conners CPT and TOVA paradigms
This is a cognitive assessment tool, not a diagnostic instrument.
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