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How is virtual training cost effective?

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Article by: Simon Lesné

Publishing Date: 9th March 2022

The psychology of retaining information

In the late 19th century, German psychologist Hermann Ebbinghaus demonstrated how people retain information and named his hypothesis the ‘forgetting curve’. He stated that in traditional learning environments such as classrooms, the average learner will forget half of the information received within the first hour.

A day later, this number is up to 70%, and without any repetition of the lesson, close to 90% of the information is gone from our memory after a month. This theory still holds true today, as shown in the recent State of Learning report[1] from online learning provider Cerego, which found similar numbers in a study they conducted with their online students.

To overcome this disadvantage inherent to our brains, researchers have looked into the role played by emotions in our recollection of events and facts, and several studies[2] have highlighted the fact that we remember more of a situation when strong emotions were associated with it. One of the key feature of virtual reality is its ability to trick our brains into thinking it evolves in the real world, narrowing the gap between the subject and the medium it interacts with.

This immersion allows for a broader range of experiences where our senses and emotions are triggered in a believable way. This has been used in clinical environments in what was called therapy fear, where patients exposed to various threatening situations related to a phobia reported feelings of anxiety similar to those they experience in real conditions. The control over the environment that VR offers allowed for repeated sessions in a safe environment where patients were able to learn to overcome their fear at a faster pace than with traditional therapy[3].

Virtual learning and gamification

Digital game-based learning has been growing rapidly since the democratisation of computers and mobile devices, and virtual reality devices have already yield promising results in a vast array of VR training situations and social experiments, from helping professional athletes reach their potential[4], to demonstrating the positive effects of virtual reality simulations on the empathy, behaviour and awareness of the learners regarding endangered species or natural environments[5].

Where virtual reality shines in comparison to its digital counterparts, it is in its ability to replicate any situation or environment while placing the learner at the centre of the stage, free to navigate and interact with the virtual world almost as they would in real life. It provides a credible reproduction of a real-world simulation that can be adjusted to fit the training goal and coupled with game mechanics to keep the learner engaged: constraints of speed, of complexity, scoring system, social competition…

This freedom and control from the subject on the exploration of its environment has the advantage of enhancing visual memory compared to a two-dimensional medium[6], as well as being able to develop a muscle memory of an action that could reveal difficult or expensive to artificially reproduce solely for training purposes.

The same mechanisms can be applied in a learning environment using game-based learning, a method that combines educational content with game mechanics, helping the learners stay engaged with the content and motivated by the constant feedback loop that games create.

Costs and the potential for vr training

According to the latest Training Industry Report[7] which looks at the training expenditures of US companies of various sizes, the average cost of training for large companies was above $22,000,000 (€20,000,000) in 2020, and growing.

VR training has a wide range of potential applications across all fields of work, and the Industrial Design Consultancy expects the sector to contribute €260 billion to the global economy by the end of the decade, putting it at the forefront of the new technologies in the training and educational field.

Virtual Reality has the potential to offer efficient, adaptable and cost-effective training to a growing number of companies at a cost that keeps declining as the technology improves and the devices gain in popularity and performance.


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Developments in VR Hand Tracking

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Article by: Imran

Publishing Date: 7th March 2022


In the world of virtual reality, hand tracking allows the user to interact with the virtual world without the use of controller devices and instead use a virtual representation of their physical hands within the virtual world. This allows for more immersion and “realism” within the virtual world. 

In the real world your hands are not bound to controller devices as you interact with the real world, and this allows for a lot of freedom for your hands. The current and further developments of hand tracking within virtual reality will allow for a similar level of freedom and realism when it comes to interactions in the virtual world.

Developments in VR Hand Tracking:

Hand tracking in virtual reality has come a long way since one of the first developments in hand tracking in 1982. This hand tracking was achieved using Sayre gloves, which are wired gloves. These gloves achieved hand tracking by using light emitters that hit the photocells in different ways depending on the finger movements of the wired gloves, these photocells would then convert these movements into electrical signals [1].

One of the many current developments in VR hand tracking allows for hands-free hand tracking without controllers or gloves. One of the ways this is achieved is through the combined effort of VR hand tracking hardware, VR tracking software, and VR tracking tools and applications. 

The tracking hardware uses sensors that are built into the virtual reality headset that collect hand data like positions, rotations, and movements of your hands. The VR tracking software and engine will then process the gathered data (positions, rotations, and movements of the hands) to generate a pair of hands within the virtual world that are a representation of your pair of hands in the real world.

When the real hands have been tracked and a pair of virtual hands have been created within the virtual world, the virtual reality applications and tools will then use the virtual hands to allow for interactions in the virtual world using hand gestures that are similar to the interactions that real hands will have in the real world. 

The user will be able to grab a specific object the same way you would grab it in the real world, for example grabbing a cup by its handle in the virtual world like you would in the real world. The user could poke, touch, and scroll specific objects in the virtual world similar to how you poke and scroll on the screen of a smartphone, or press on the keys of a keyboard with your fingers, and touch a button [2].


Virtual reality and hand tracking in virtual reality has clearly come a long way since the 1980s, we went from wired gloves using photocells that sent electrical signals as a way to track hand movements towards having a virtual reality headset with the tracking sensors built into the headset that allowed for tracking of the positions, rotations and movements of the hands and creating virtual representation of these hands in the virtual world. This then allowed for virtual hand tracking and interactions that are similar to the hand interactions, we have in the real world without mostly needing controllers or wired gloves.

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VR and Immersion

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Article by: Henry Gaudet

Publishing Date: 28th March 2022

VR is on its way to becoming mainstream, but until it does, until we all intuitively understand its language – its shorthand and conventions – the way we do with the language of film – it can be hard to grasp what exactly Virtual Reality brings to the table. Sure, it looks great, but what is it… for?

There’s a vague desire to connect it to existing media, to think of it like video games, or like 3D movies, or some sort of hybrid. And in so doing, we mentally pigeonhole it with those other media, assuming it has similar benefits and limitations, that it’s essentially them, but with a twist.

But those comparisons don’t really capture what VR does or what it can do. And so, for those not yet familiar with the technology, we’d like to offer some insight into its potential, starting with the actual experience of being in a virtual environment. 

While movies and TV provide a window into a new reality, VR drops you right in the middle. There is no screen. There is no frame. Everything around you on all sides belongs to this digital reality. Even you – yes you – are digital! Hold your hand in front of your face and what you see is not your physical hand, but a digital double, one that can interact with this world.

The world you find yourself in may be simple or detailed, stylised or realistic, but it is novel and (assuming the designers have done their job well!) engaging. It invites exploration and experimentation. And it is as close to distraction-free as we’re likely to find today. 

Just about every form of media out there comes with a risk of distraction. Most of us have at some point scrolled on our phones while “watching” TV, giving neither our full attention. With VR, that’s not really an option. When you put on your headset, the virtual environment fills your entire field of view. There is no glancing at your phone or checking the clock on the wall without removing that headset.

To be fair, this level of immersion comes with some limits and considerations. The headset leaves you effectively blinded to the physical world, so you will need to ensure that you wear it in a safe environment. 

If you move in the VR world, make sure you have the space to move in the physical. Even for seated experiences, it’s important to make sure that the area around you is clear so that a gesture in the virtual world doesn’t knock over your very physical coffee cup!

The result is a more focused experience, one where multitasking is simply not an option, and one that contrasts sharply with our attention-craving modern world. 

This feature particularly stands out in VR training exercises. Paired with the interactive nature of VR, this makes for a course that holds attention and produces rapid learning. 

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Hand-Tracking Developments

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Article by: Jordan Murphy

Publishing Date: 21st March 2022

Virtual Reality has pushed the boundaries in the immersive field since it started, and one of the newest features of this is Hand-Tracking. Hand-Tracking for the Oculus Quest is still in the beta version at the current time; however, Facebook have revealed their new iteration that they are working on. Their high-fidelity hand-tracking is on Facebook’s research page, a publication called Constraining Dense Hand Surface Tracking with Elasticity

Hand-Tracking works by using the inside-out cameras that are a part of the Oculus Quest’s hardware. The headset detects the position and orientation of the user’s hands and tracks the configuration of the users’ fingers. Once the headset detects them, the computer vision algorithms are used to track the movement and orientation of the user’s hands. 

Facebook Reality Labs

Facebook Reality Labs (FRL) journey to create more natural devices started with the Touch controllers. The Touch controllers for the Oculus Quest are comfortable to hold and contain sophisticated sensors. They deliver a life like hand presence and make the most basic interactions in VR feel like the user is doing that action. As close to the real thing that the Touch controllers can get, they cannot replicate the expressiveness of hand signs or the act of typing. 

On the 1st of December 2020, FRL published a paper with an accompanying video that showed their new research and technology allowing them to track the human hand in real time. With Facebook’s interest in VR through Oculus, it is not surprising to see them working on a better VR environment that is closer to human interaction. The efforts made to create the hand-tracking system for the Oculus Quest had an issue with hand overlap, which is the core of the goal of FRL’s latest research. The research focused on solving the big problem of losing tracking when hands overlap, touch, or fingers are self-occluded (Hexus, 2020).

Self-contact and hand-tracking technology

Many of the gestures and actions that people make with their hands involve self-contact and occlusion: shaking hands, making fists, or interlacing their fingers while thinking or idle. These uses illustrate why hand-tracking technology today is not designed to treat the extreme amounts of self-contact and self-occlusion exhibited by the common hand gestures.

FRL’s paper states that by extending recent advances in vision-based tracking and physically based animation, they can present the first algorithm capable of tracking high-fidelity hand deformations through highly self-contacting and self-occluding hand gestures. In the paper, they describe that by constraining a vision-based tracking algorithm with a physically based deformable model, they have obtained an algorithm that is robust enough for use in self interactions and massive self-occlusion that are displayed by the common hand gestures, allowing them to have two hands interacting with each other and some of the most difficult gestures that the human hands can make. 

Despite the improvements that this paper has proven to make on the already publicly available hand-tracking technology, the method that FRL has developed has its limitations. It is computationally expensive. The method is also limited by the ability to capture high frequency folds and wrinkles. In Figure 4 of the paper, they recorded that sometimes the captured images do not portray the wrinkles on the tracked mesh. These are issues that can be worked out in future iterations, but this research shows a promising future for hand-tracking in the immersive industry.


At Mersus Technologies, we use Hand-Tracking on our Avatar Academy Platform. This allows us to create as close to real world experiences as possible which benefits the learner in the transfer of the knowledge and skill they gain from Avatar Academy to the real world procedures. 

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