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The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia

Self-report plays a key role in the identification of developmental prosopagnosia (DP), providing complementary evidence to computer-based tests of face recognition ability, aiding interpretation of scores. However, the lack of standardized self-report instruments has contributed to heterogeneous re...

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Autores principales: Shah, Punit, Gaule, Anne, Sowden, Sophie, Bird, Geoffrey, Cook, Richard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632531/
https://www.ncbi.nlm.nih.gov/pubmed/26543567
http://dx.doi.org/10.1098/rsos.140343
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author Shah, Punit
Gaule, Anne
Sowden, Sophie
Bird, Geoffrey
Cook, Richard
author_facet Shah, Punit
Gaule, Anne
Sowden, Sophie
Bird, Geoffrey
Cook, Richard
author_sort Shah, Punit
collection PubMed
description Self-report plays a key role in the identification of developmental prosopagnosia (DP), providing complementary evidence to computer-based tests of face recognition ability, aiding interpretation of scores. However, the lack of standardized self-report instruments has contributed to heterogeneous reporting standards for self-report evidence in DP research. The lack of standardization prevents comparison across samples and limits investigation of the relationship between objective tests of face processing and self-report measures. To address these issues, this paper introduces the PI20; a 20-item self-report measure for quantifying prosopagnosic traits. The new instrument successfully distinguishes suspected prosopagnosics from typically developed adults. Strong correlations were also observed between PI20 scores and performance on objective tests of familiar and unfamiliar face recognition ability, confirming that people have the necessary insight into their own face recognition ability required by a self-report instrument. Importantly, PI20 scores did not correlate with recognition of non-face objects, indicating that the instrument measures face recognition, and not a general perceptual impairment. These results suggest that the PI20 can play a valuable role in identifying DP. A freely available self-report instrument will permit more effective description of self-report diagnostic evidence, thereby facilitating greater comparison of prosopagnosic samples, and more reliable classification.
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spelling pubmed-46325312015-11-05 The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia Shah, Punit Gaule, Anne Sowden, Sophie Bird, Geoffrey Cook, Richard R Soc Open Sci Psychology and Cognitive Neuroscience Self-report plays a key role in the identification of developmental prosopagnosia (DP), providing complementary evidence to computer-based tests of face recognition ability, aiding interpretation of scores. However, the lack of standardized self-report instruments has contributed to heterogeneous reporting standards for self-report evidence in DP research. The lack of standardization prevents comparison across samples and limits investigation of the relationship between objective tests of face processing and self-report measures. To address these issues, this paper introduces the PI20; a 20-item self-report measure for quantifying prosopagnosic traits. The new instrument successfully distinguishes suspected prosopagnosics from typically developed adults. Strong correlations were also observed between PI20 scores and performance on objective tests of familiar and unfamiliar face recognition ability, confirming that people have the necessary insight into their own face recognition ability required by a self-report instrument. Importantly, PI20 scores did not correlate with recognition of non-face objects, indicating that the instrument measures face recognition, and not a general perceptual impairment. These results suggest that the PI20 can play a valuable role in identifying DP. A freely available self-report instrument will permit more effective description of self-report diagnostic evidence, thereby facilitating greater comparison of prosopagnosic samples, and more reliable classification. The Royal Society Publishing 2015-06-24 /pmc/articles/PMC4632531/ /pubmed/26543567 http://dx.doi.org/10.1098/rsos.140343 Text en http://creativecommons.org/licenses/by/4.0/ © 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Psychology and Cognitive Neuroscience
Shah, Punit
Gaule, Anne
Sowden, Sophie
Bird, Geoffrey
Cook, Richard
The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title_full The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title_fullStr The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title_full_unstemmed The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title_short The 20-item prosopagnosia index (PI20): a self-report instrument for identifying developmental prosopagnosia
title_sort 20-item prosopagnosia index (pi20): a self-report instrument for identifying developmental prosopagnosia
topic Psychology and Cognitive Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632531/
https://www.ncbi.nlm.nih.gov/pubmed/26543567
http://dx.doi.org/10.1098/rsos.140343
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