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Related Concept Videos

Prosopagnosia01:24

Prosopagnosia

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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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Articles linked to this work by shared authors, journal, and citation graph.

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Hyperfamiliarity for faces: Preserved core face processing with altered medial temporal lobe connectivity in a single case study.

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Related Experiment Video

Updated: Apr 21, 2026

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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Voice Recognition in Face-Blind Patients.

Ran R Liu1, Raika Pancaroglu1, Charlotte S Hills1

  • 1Human Vision and Eye Movement Laboratory, Departments of Medicine (Neurology), Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC, Canada.

Cerebral Cortex (New York, N.Y. : 1991)
|October 29, 2014
PubMed
Summary

Anterior temporal lobe damage can cause prosopagnosia (face recognition impairment). However, voice recognition abilities vary, suggesting some cases are modality-specific, not a general person recognition deficit.

Keywords:
familiaritymultimodalprosopagnosiasemanticvoice perception

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Neurology

Background:

  • Anterior temporal lobe lesions can impair face recognition, leading to prosopagnosia.
  • It remains debated whether this deficit is modality-specific (associative prosopagnosia) or part of a broader person recognition disorder.

Purpose of the Study:

  • To investigate the impact of anterior temporal lobe damage on both face and voice recognition.
  • To differentiate between modality-specific face recognition deficits and multimodal person recognition impairments.

Main Methods:

  • Assessed voice perception and recognition in 10 subjects with face recognition deficits post-cerebral lesions.
  • Categorized lesions based on location (fusiform cortex, anterior temporal lobes) and laterality (right, bilateral).

Main Results:

  • Subjects with fusiform cortex lesions (apperceptive prosopagnosia) showed intact voice recognition.
  • One subject with bilateral lesions had both prosopagnosia and phonagnosia (voice recognition deficit).
  • Bilateral anterior temporal lesions were associated with multimodal person recognition deficits, while right anterior temporal lesions often resulted in modality-specific prosopagnosia.

Conclusions:

  • Right anterior temporal lesions can cause modality-specific associative prosopagnosia.
  • Bilateral anterior temporal lesions may lead to a broader multimodal disorder of person recognition.
  • The findings have implications for cognitive and neuroanatomic models of person recognition.