This self-report questionnaire, the Twenty-item prosopagnosia index (PI20), assesses the presence and severity of prosopagnosic traits.
Participation in this test is voluntary and you are able to withdraw at any stage. Your results will be kept confidential, held in a secure encrypted manner, in line with the Data Protection Act 1998
. If you have any questions about this task, our research or anything else, feel free to contact us at [email protected]
Researchers may freely use the PI20 for academic purposes. Please cite the measure as follows:
Shah, P., Gaule, A., Sowden, S., Bird, G., & Cook, R. (2015). The 20-item prosopagnosia index
(PI20): A self-report instrument for identifying developmental
prosopagnosia. Royal Society Open Science, 6: 140343.
Please contact the lead author ([email protected]
) before using the PI20 for non-research applications (e.g. on media websites, in healthcare or clinical settings).
A printable version of the PI20 is also available for free download with guidance on scoring and interpretation. pdf