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Usability issues were identified with the app. Some usability enhancements are being implemented prior to continuing with the study
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The study will begin with an explanatory/training session where individuals with low vision will learn to use the V-NAV (Vortant NAVigation tool) indoor navigation app, and will have the opportunity to try it for a few representative tasks. The main activity includes a take-home trial, an extended unstructured period to emulate the post-purchase experience of users, during which participants will have the opportunity to use the V-NAV in their everyday lives. Data will be collected from the users to measure the relative advantage of V-NAV compared to the user's current indoor navigation method.
The introductory session, emphasizing real-world experiences, will involve a brief training session followed by simulated navigation experiences in a convenient location to the users. Participants will use V-NAV to record approximately 8 locations, then will be given instructions to find these locations again. The V-NAV prototype's logging software will measure distance walked and task time. Participants will complete a study-specific tool covering the relevant attributes of the V-NAV prototype, as well as a standardized tool, the NASA TLX (Task Load Index).
Subsequently, participants will complete a take-home trial, during which they will be encouraged to use the V-NAV features regularly to support their everyday community navigation activities. Participants will be contacted approximately weekly with a "check-in" to answer questions and resolve any emergent technical problems. At the conclusion of the trial, a product-specific tool and an appropriate standardized tool, the PIADS (Psychosocial Impact of Assistive Devices Scale) will be administered.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| V-NAV users | Experimental | Users who try the V-NAV for navigation tasks. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| V-NAV indoor navigation prototype | Other | Users will use the V-NAV prototype as an augmentation to their indoor navigation activities. |
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| Measure | Description | Time Frame |
|---|---|---|
| V-NAV effectiveness | A measurement of user impressions as to the value of the V-NAV navigation aid. Use of e.g., PIADS survey. | 4 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| V-NAV usability | A measurement of how usable the V-NAV is. Use of e.g., NASA TLX survey. | 1 day |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Philip R Schaefer, M.S.E | Vortant Technologies, LLC | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Vortant Technologies | Weaverville | North Carolina | 28787 | United States |
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| ID | Term |
|---|---|
| D001766 | Blindness |
| D015354 | Vision, Low |
| ID | Term |
|---|---|
| D014786 | Vision Disorders |
| D012678 | Sensation Disorders |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
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Participants will compare the value of the prototype app to their previous navigational experience without the app.
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The use of the app will not be masked.
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| D005128 |
| Eye Diseases |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |