Balance Reactions in a Virtual Environment With Avatar and/or Reinforced Visual Signal Compared to a Real Environment

Study Overview
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Brief Summary
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The scientific literature shows that there is a degradation of balance in virtual reality. This trial investigates the introduction of a full-body avatar and/or enhanced visual cues on the reduction of the degradation.

Official Title
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Study of the Postural Reactions of Balance Compared Between Real Environment and Virtual Environment With Avatar and Reinforced Visual Signal.

Conditions
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Healthy

Intervention / Treatment
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* Other: Intervention A : virtual environment with avatar
* Other: Intervention B : virtual environment with reinforced visual signal
* Other: Intervention C : virtual environment with avatar and reinforced visual signal
* Other: Intervention D : real environment


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy volunteer, men and women over 18 years old Exclusion Criteria: Severe visual deficiency not allowing an activity in immersive virtual reality. Immobilization of one of the upper limbs (splint restraint splint) Orthopedic and painful problems of the inferior limb MSSQ greater than 25 Pregnant woman Person under legal protection

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Allocation: Randomized
Intervention Model: Sequential Assignment
Interventional Model Description: Prospective, multicenter, controlled, randomized study on healthy volunteers.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: BCAD's arm<br>The 4 interventions are in the BCAD's order. | Other: Intervention A : virtual environment with avatar<br>* 30-second right and left unipodal static and dynamic balance test with avatar only<br>Other: Intervention B : virtual environment with reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with reinforced visual signal only<br>Other: Intervention C : virtual environment with avatar and reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with avatar and reinforced visual signal<br>Other: Intervention D : real environment<br>* 30-second right and left unipodal static and dynamic balance test in real environment<br>|
| Experimental: BACD's arm<br>The 4 interventions are in the BACD's order. | Other: Intervention A : virtual environment with avatar<br>* 30-second right and left unipodal static and dynamic balance test with avatar only<br>Other: Intervention B : virtual environment with reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with reinforced visual signal only<br>Other: Intervention C : virtual environment with avatar and reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with avatar and reinforced visual signal<br>Other: Intervention D : real environment<br>* 30-second right and left unipodal static and dynamic balance test in real environment<br>|
| Experimental: CABD's arm<br>The 4 interventions are in the CABD's order. | Other: Intervention A : virtual environment with avatar<br>* 30-second right and left unipodal static and dynamic balance test with avatar only<br>Other: Intervention B : virtual environment with reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with reinforced visual signal only<br>Other: Intervention C : virtual environment with avatar and reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with avatar and reinforced visual signal<br>Other: Intervention D : real environment<br>* 30-second right and left unipodal static and dynamic balance test in real environment<br>|
| Experimental: ACBD's arm<br>The 4 interventions are in the ACBD's order. | Other: Intervention A : virtual environment with avatar<br>* 30-second right and left unipodal static and dynamic balance test with avatar only<br>Other: Intervention B : virtual environment with reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with reinforced visual signal only<br>Other: Intervention C : virtual environment with avatar and reinforced visual signal<br>* 30-second right and left unipodal static and dynamic balance test with avatar and reinforced visual signal<br>Other: Intervention D : real environment<br>* 30-second right and left unipodal static and dynamic balance test in real environment<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Area of CoP (Center of pression) for each test (in cm²) | Mesure of area of center of pression during the balance tests in virtual condition and real condition, order in terms of randomisation | Immediately after inclusion | 
| Total distance covered by the CoP during the balance test (in cm) | Mesure of the total distance covered by the CoP during the balance tests (in cm) in virtual condition and real condition, order in terms of randomisation | Immediately after inclusion | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Simulator Sickness Quantifying (SSQ) | SSQ completed after the balance test, SSQ is a scale of cyber sickness, from 0 to 48 | Immediately after the balance test |