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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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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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EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
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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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Related Experiment Video

Updated: Mar 31, 2026

Testing Tactile Masking between the Forearms
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Bilateral Advantages in Subitizing With Visual Masking.

Campbell G Pryor, Piers D L Howe

    Perception
    |October 23, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Subitizing, the rapid enumeration of small object sets, can show bilateral advantages, but only when visual displays are backward-masked. This finding challenges previous research and offers new insights into visual processing.

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    Area of Science:

    • Cognitive Psychology
    • Visual Perception
    • Neuroscience

    Background:

    • Bilateral visual processing generally enhances performance on visual tasks.
    • Previous studies found no bilateral advantage for subitizing, contradicting theoretical predictions.
    • The FINgers of INSTantiation (FINST) theory predicts subitizing should benefit from bilateral presentation.

    Purpose of the Study:

    • To investigate conditions under which subitizing might exhibit a bilateral advantage.
    • To reconcile conflicting findings regarding bilateral presentation and subitizing.
    • To explore the influence of encoding speed and time on subitizing.

    Main Methods:

    • Experimental manipulation of visual display presentation (unilateral vs. bilateral).
    • Inclusion of backward-masking as a key variable.
    • Comparison of subitizing performance under different masking conditions.

    Main Results:

    • Subitizing demonstrated a bilateral advantage specifically when the visual display was backward-masked.
    • This contrasts with prior findings that reported no bilateral advantage for subitizing.
    • The results suggest that encoding rate and available encoding time are critical factors.

    Conclusions:

    • Bilateral advantages in subitizing are condition-dependent, emerging under backward-masking.
    • The findings necessitate a revised understanding of FINST theory and bilateral processing.
    • A general model is proposed to explain bilateral advantages in subitizing based on encoding dynamics.