ArticleRoyal Society open science2021
The Twenty Item Prosopagnosia Index (PI20) provides meaningful evidence of face recognition impairment.
Article in Royal Society open science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 39 citations in OpenAlex.
- Item analyses of the 20-item prosopagnosia index using classical test theory and item response theory.Behavior research methods · 2026Article
- Within-person face recognition strongly correlates with objective face processing assessments: a study beyond the WEIRD populations.Royal Society open science · 2025Article
- Subjective Face Recognition Ability Is Linked to Objective Face Memory and Face Authenticity Judgment: Validation of the Traditional Chinese Version of the 20-Item Prosopagnosia Index.Brain sciences · 2025Article
- Normative face recognition ability test scores vary across online participant pools.Scientific reports · 2025Article
- Dynamic Emotion Recognition and Expression Imitation in Neurotypical Adults and Their Associations with Autistic Traits.Sensors (Basel, Switzerland) · 2024Article
- Autistic adults exhibit a typical search advantage for facing dyads.Autism research : official journal of the International Society for Autism Research · 2024Article
- Poor face recognition predicts social anxiety in autism: A short report.Autism : the international journal of research and practice · 2024Article
- Improving the DSM-5 approach to cognitive impairment: Developmental prosopagnosia reveals the need for tailored diagnoses.Behavior research methods · 2024Article
- Autistic adults have insight into their relative face recognition ability.Scientific reports · 2024Article
- Exploration of the Links Between Psychosocial Well-being and Face Recognition Skills in a French-Speaking Sample.Psychologica Belgica · 2024Article
- A new approach to diagnosing and researching developmental prosopagnosia: Excluded cases are impaired too.Behavior research methods · 2023Article
- The Danish Version of the 20-Item Prosopagnosia Index (PI20): Translation, Validation and a Link to Face Perception.Brain sciences · 2023Article
- Article
- Is It Just Face Blindness? Exploring Developmental Comorbidity in Individuals with Self-Reported Developmental Prosopagnosia.Brain sciences · 2022Article
- Contributions of face processing, social anhedonia and mentalizing to the expression of social autistic-like traits.Frontiers in behavioral neuroscience · 2022Article
- The Twenty Item Prosopagnosia Index (PI20) provides meaningful evidence of face recognition impairment.Royal Society open science · 2021Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Twenty Item Prosopagnosia Index (PI20) is a self-report questionnaire used for quantifying prosopagnosic traits. This scale is intended to help researchers identify cases of developmental prosopagnosia by providing standardized self-report evidence to complement diagnostic evidence obtained from objective computer-based tasks. In order to respond appropriately to items, prosopagnosics must have some insight that their face recognition is well below average, while non-prosopagnosics need to understand that their relative face recognition ability falls within the typical range. There has been considerable debate about whether participants have the necessary insight into their face recognition abilities to respond appropriately. In the present study, we sought to determine whether the PI20 provides meaningful evidence of face recognition impairment. In keeping with the intended use of the instrument, we used PI20 scores to identify two groups: high-PI20 scorers (those with self-reported face recognition difficulties) and low-PI20 scorers (those with no self-reported face recognition difficulties). We found that participant groups distinguished on the basis of PI20 scores clearly differed in terms of their mean performance on objective measures of face recognition ability. We also found that high-PI20 scorers were more likely to achieve levels of face recognition accuracy associated with developmental prosopagnosia.
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