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Common Data Element:  NIH Toolbox Sensation Domain Dynamic Visual Acuity Test - Trial result type

Listed below are the details for the data element.

1.0
Element Type
Common Data Element
NIH Toolbox Sensation Domain Dynamic Visual Acuity Test - Trial result type
NIHTBDVATrialResultType
Short Description
Trial result type (correct or incorrect), as part of NIH Toolbox Sensation Domain Dynamic Visual Acuity Test
Definition
Trial result type (correct or incorrect), as part of NIH Toolbox Sensation Domain Dynamic Visual Acuity Test
 

Biomedical Terminologies and Standards

Notes
Creation Date
2016-06-03
Historical Notes
References
http://www.nihtoolbox.org/WhatAndWhy/Sensation/Vestibular/Pages/NIH-Toolbox-Dynamic-Visual-Acuity-Test-.aspx

Data Type
Alphanumeric
Input Restrictions
Single Pre-Defined Value Selected
Pre-Defined Values
External Schema Permissible Value Mapping
Population
Adult and Pediatric
Guidelines/Instructions
The NIH Toolbox Dynamic Visual Acuity Test (DVA) is a measure of gaze stability during head movement, which helps identify individuals who may have a deficit of the vestibular system (which regulates internal balance). First, the NIH Toolbox Visual Acuity Test must be administered, followed by the DVA Test. Participants are again seated 12.5 feet from a computer monitor at eye level. For the DVA Test, participants wear lightweight headgear that contains a rate sensor and are asked to move the head back and forth, as if saying no. Once the head is measured to be moving at greater than 180 degrees per second by the rate sensor, an optotype flashes on the monitor, and the participant is asked to identify it. As with the Visual Acuity Test, only the letters H, O, T, and V are used for ages 3 to 7 while ages 8+ use the entire letter set. Smaller optotypes are displayed as the participant correctly identifies letters, and larger ones are displayed if the participant cannot correctly identify the letter shown, until the computer has calculated the smallest size that the participant can see with the head moving. This is calculated separately for head rotation leftward and rightward from center (though the participant continues shaking the head both ways), and this performance is compared to the participants visual acuity when the head was stationary (the NIH Toolbox Visual Acuity Test 16 score, sometimes referred to as static visual acuity in the context of the DVA test). The difference between static and dynamic visual acuity represents the vestibular contribution to gaze stability. The DVA Test takes approximately six minutes to administer and is recommended for ages 3-85.
Preferred Question Text
Category Groups and Classifications
DiseaseDomainSub-Domain
Traumatic Brain Injury Outcomes and End Points Cognitive Activity Limitations
General (For all diseases) Assessments and Examinations Physical/Neurological Examination

Classification

Concussion/Mild TBI :
Supplemental
Epidemiology :
Supplemental
Moderate/Severe TBI: Rehabilitation :
Supplemental
Acute Hospitalized :
Supplemental
General (For all diseases) :
Supplemental
Keywords
Vestibular , NIH_Toolbox , Sensation , Dynamic_Visual_Acuity_Test
Labels
Effective Date
Until Date
Last Change Date
Tue May 08 11:24:15 EDT 2018
See Also
NIH Toolbox Visual Acuity Test
Submitting Organization Name
NIH/CIT/BRICS
Submitting Contact Name
Bianca Siravo
Submitting Contact Information
smilee.samuel@nih.gov
Steward Organization Name
NIH/CIT/BRICS
Steward Contact Name
Olga Vovk
Steward Contact Information
olga.vovk@nih.gov
NINDS ID

Change History