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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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 end"...

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Related Experiment Video

Updated: Jun 25, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
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Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Assessment of spatial neglect using computerised feature and conjunction visual search tasks.

Asnat Bar-Haim Erez1, Noomi Katz, Haim Ring

  • 1School of Occupational Therapy, Hebrew University and Hadassah, Jerusalem 91240, Israel. aaerez@zahav.net.il

Neuropsychological Rehabilitation
|March 5, 2009
PubMed
Summary

A new computerised visual search test effectively identifies unilateral spatial neglect (USN) in stroke patients. This sensitive tool aids in monitoring recovery, outperforming traditional methods by reducing learning effects.

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Last Updated: Jun 25, 2026

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Rehabilitation Medicine

Background:

  • Unilateral spatial neglect (USN) is a common deficit following stroke, impacting daily activities.
  • Standard diagnostic tools for USN, like paper-and-pencil tests, may be limited by learning effects in longitudinal studies.

Purpose of the Study:

  • To evaluate the diagnostic sensitivity of feature and conjunction visual search tasks using a novel computerised program (VISSTA) for assessing USN in stroke patients.
  • To compare the effectiveness of computerised assessment against traditional paper-and-pencil tests.

Main Methods:

  • Seventy-two stroke patients and 39 healthy controls completed computerised visual search tasks (VISSTA) and standard paper-and-pencil tests.
  • Measures included hit rate and reaction time for feature and conjunction searches.
  • Assessment also included the impact of neglect on activities of daily living.

Main Results:

  • The computerised VISSTA test effectively differentiated between stroke patients and healthy controls, and among different patient subgroups.
  • Stroke patients with USN demonstrated a significant contralesional disadvantage in both feature and conjunction visual search tasks.
  • The computerised assessment showed high diagnostic sensitivity for USN.

Conclusions:

  • Computerised assessment of visual search capacity is a sensitive and valuable adjunct to standard USN diagnostic tests.
  • VISSTA offers advantages over paper-and-pencil tests, particularly in longitudinal studies, due to reduced susceptibility to learning effects.
  • This computerised approach is suitable for monitoring recovery from USN over time.