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PI20
Face Blindness Test (PI20)
The 20-item Prosopagnosia Index (PI20) is a validated self-report screening for developmental prosopagnosia, difficulty recognizing faces. Published by Shah et al. (2015, Royal Society Open Science) and used in research worldwide. Takes about 5 minutes.
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Disclaimer: This is a screening tool, NOT a diagnosis. A high score suggests your face recognition may be weaker than average and can be a starting point for a conversation with a professional; formal diagnosis of prosopagnosia requires objective face-processing tests administered by a specialist. Items reproduced under the CC-BY 4.0 license from Shah et al. (2015).
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