Why ‘Embodiment’ is More Important Than ‘Immersion’ – Inside XR Design

By
Ben Lang
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Extend Your Reach

Synapse might have lots of shooting, but your off-hand has this awesome telekinetic power that lets you grab and manipulate entities in the world. You can pull people to toss them in the air, or smash them on the ground. You can crush people with boxes or use one for cover. And you can even move platforms.

Barrels add explosive fun to the mix, but the developers snuck in a really clever little detail. When holding a barrel you need to hold the trigger only part way, because squeezing it all the way causes the barrel to explode. This can be useful for blowing it up in an enemy’s face, but it’s also a really cool way to force the player to balance their aggression with intention.

If you hastily grab a barrel without thinking in the middle of a fight, you’ll squeeze the trigger too hard and make it explode.

But if you keep a cool head, you can use barrels to great effect. Such a cool detail.

Ok but how does any of this telekinesis stuff relate to embodiment?

Well, remember when I said that things you can physically interact with start to feel more real because your brain incorporates them into your proprioceptive model? The same holds true for the things you control with telekinesis.

Even though you’re interacting with them at a distance, the fact that they respond to your natural motion—instead of a thumbstick or button press—makes all the difference.

When it comes to shooting, pulling a trigger to kill a distant bad guy is a very ‘impersonal’ interaction; it’s quick and you have little conscious control over the parameters of how the interaction happens.

On the other hand (pun intended), controlling something with the movement of your own arm and hand—even at a distance—is so much more direct and personal. It feels like having a super-power, instead of just pointing at enemies and pressing the trigger a few times to make them die.

And another reason why telekinesis in Synapse feels like a superpower is because the game uses PSVR 2’s eye-tracking to detect which object you want to grab. So there might be three or four valid things in front of you, but you can pluck out the right one by looking at it.

In practice, it feels really natural—almost like the game is reading your mind. It kind of makes it feel like you really have this power. And to me that’s one of the coolest parts of this game.

The Takeaway

Synapse has several smart design choices that enhance the game’s feeling of embodiment. But let’s say you’re not making a cover shooter or a game with telekinetic powers. How do we simplify these lessons in a way that’s more broadly applicable?

To me the clear pattern is that embodiment is driven primarily by two things.

First is that the more you need to move your actual body—rather than just your thumbs—the more you will feel embodied. And second is that near-field interactions—meaning touching things within arms reach—are a powerful way to absorb the virtual world into your brain’s proprioceptive model.

And again, that model is what’s keeping track of where things are in space in relation to your body. So when we activate that model within our brain… of course that’s going to make us feel more embodied within the game world.

What About Presence?

Before we wrap up, I want to add a tiny addendum here. Those of you who have followed the XR design space closely are probably familiar with a concept called ‘presence’. And you probably noticed that my definition of embodiment sounds just like presence. And you’d be right! They’re essentially the same thing.

The reason why I lean into the term embodiment is because presence is a more common term and it overlaps a bit too much with ‘immersion’ in the colloquial sense. I find that people struggle to differentiate them, which makes discussions like this one less clear. So I like the word embodiment because it’s more distinct from immersion than presence. And it also specifically addresses the body itself, which is what this is all about.

Enjoyed this breakdown? Check out the rest of our Inside XR Design series and our Insights & Artwork series.

And if you’re still reading, how about dropping a comment to let us know which game or app you think we should cover next?
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Ben Lang
Ben is the world's most senior professional analyst solely dedicated to the XR industry, having founded Road to VR in 2011—a year before the Oculus Kickstarter sparked a resurgence that led to the modern XR landscape. He has authored more than 3,000 articles chronicling the evolution of the XR industry over more than a decade. With that unique perspective, Ben has been consistently recognized as one of the most influential voices in XR, giving keynotes and joining panel and podcast discussions at key industry events. He is a self-described "journalist and analyst, not evangelist."
  • Dragon Marble

    Another great episode of the excellent XR design series. And thanks for arming us with a new word to describe VR. I had debates with some who claimed they could have equal “immersion” in flat games or movies. Now they can’t have “embodiment”. Checkmate.

  • ViRGiN

    Anton from H3VR (Hot Dogs, Horseshoes & Hand Grenades – SteamVR exclusive) – no, I’ll stick to doing the same shtick I’ve been doing since 2016 – more guns, less design

  • XRC

    Watched your video on YouTube a couple of days ago, very well put together and what a fantastic game design! Thanks for your ongoing work looking at this subject.

    One interesting thing to try re proprioception, from an article I wrote on index controller for Skarredghost back in 2019:

    Proprioception relating to body image is very interesting, here is a simple experiment:

    Try closing your eyes, move your arms above your head; now try touching the end of your nose with your right index finger – I’d be very surprised if you miss?

    Another test, place a piece of paper on a table in front of you, sit and then draw an “X” in the middle of the paper.

    Take a look at the X, close your eyes, raise your pen arm up and then bring it back down to where you think the X will be, make a mark, open your eyes, try again several times and see how your accuracy improves, this is proprioception recalibration on the fly!

    We maintain a surprisingly accurate body image based on the rich wealth of proprioception generated as we inhabit our bodies, which can be leveraged with interesting results when using immersive computing platforms like Virtual Reality.

    • kool

      I gotta an example of proprioception (love that word!). I’m an led engineer and I build huge led walls with ten of thousands of connections alot of the time in the dark. I used to use a headlamp but at some point you stop using your eyes and can do the job without even looking in the direction your working and access other problems while your hands just do the job without your input. In vr two examples of proprioception are when I’ve looked over the edge of a cliff and my ears popped and going deep into a cave and getting goose bumps!

  • I love this series of article. Thanks for the great insights!

  • NotMikeD

    You know I’ve got to hand it to you–I began reading this article with my arms firmly crossed, prepared to die on the hill that “we already have ‘immersion’ and ‘presence’, ALL VR games are commanding your full attention by being in-HMD, and we DON’T need yet another jargon word.” But one by one your article seemed to anticipate and address each of my points. You convinced me! (and “hand it to you” plays right into your argument too, supporting your concept of ’embodiment’)

    • Ben Lang

      Dang that’s a really awesome compliment. Thanks so much for reading with an open mind!

  • Octogod

    These are my favorites pieces on the site. Thank you for another thought provoking article.

  • John G

    Ah, now I understand why Synapse is so far only on the PSVR2, the eye tracking is obviously core to it’s mechanics.

    Fantastic article, thank you.

    I always felt the way Natural Locomotion uses foot tracking to help presence was also key – even though it’s not ‘walking’ because moving your foot up and down was so tightly tracked with how far you move, it really helped presence.

    == John ==

  • Ondrej

    Presence can be achieved with zero physicality of user’s existence.
    Even immersion is a much closer term to it.

    Your first definition of embodiment in the article – “physically present” – makes much more sense than conflating it with the pure sense of presence, which is a much more subjective phenomena.

    Embodiment requires complex game design with implementation of physics, like collissions.
    Presence can happen even with zero-design-camera and PlayStation 2 graphics, if very good roomscale tracking is used and the user is easily immersed.

  • Andrew Jakobs

    I’m sorry to tell you this, but the whole article depends on your different interpretation on the word immersion, most of the people talking about immersion in regard to VR are talking about what you call embodiment.
    For me there is no difference between ‘physically’ pull a lever or using the environment to reload the gun.
    It’s still a nice article but it’s just saying what we already feel what VR is about since day one, full immersion.

    • Ben Lang

      Sure, but I think we all acknowledge that some VR games are more “immersive” than others (if that’s the word we’re going to use). So what makes the difference? If the only thing that mattered was being in a headset, then all VR games would be equally immersive.

      So the point isn’t really about which word is “right,” it’s about separating the concepts so we can have a discussion about what factors drive the feeling like your whole body has been transported into the game vs. just having your vision taken over by the game.

      • Alexander Fewings

        I agree with the previous poster. I think really whats happened here is companies like Apple and others have basically reclaimed the word (Fully) ‘Immersive’ to mean, anything we shove in your face, as you’re pretty much describing here. And thus, yes XR devs are forced to fallback to some more specific term to describe what we’ve all been talking about for most of the last decade. Its sad but its surely not the last time it’ll happen :(

      • LegoKnockingShop

        Disagree – using the right words IS important, and the concepts are already separate, and these discussions already exist and have long been going on. Why try to redefine terms that have been in use for a long time?

        Embodiment already has a long-established definition in VR academia and development, which isn’t this unfortunately. So do Presence and Immersion. You even suggest at the end that the three words are kinda interchangeable, but they absolutely shouldn’t be seen that way, it helps nobody and sows confusion.

        Immersion is a spectrum – you can be immersed in a book but you don’t believe you’re in a book, in that world, living it – which is what Presence represents in the loosest terms, the full illusion that you’re there and present in that reality, not IRL. You don’t have to feel embodied to achieve presence (but it sure can help!). Immersion is a function of both software design and hardware engineering, and Presence is the generally desired experiential goal of that immersion. Embodiment is specifically the user’s acceptance that the virtual body they’re seeing is their own body. Its purely about aspects of body ownership can be a contributing factor to achieving Presence, not just an alternate name for it.

        There’s obvious benefit in adopting a unified accepted lexicon as our medium grows. If you wanted to argue that these names are traditionally mis-assigned, then go for it, it’s healthy for these established definitions and scopes to be examined periodically to make sure they’re still applicable and useful terms. Maybe that’s the aim here? But if so, I’m puzzled why you don’t reference or acknowledge the existing use of these terminologies as a starting point.

        • psuedonymous@mailinator.com

          Yep! I have a hard enough time trying to explain to people that “Presence” and “Immersion” are not the same thing, now I’m going to have to fight against the misuse of “Embodiment” too. Deliberately mixing existing defined terms is not OK!

        • Ben Lang

          As long as the participants of a given conversation know the definitions being used, the specific terms don’t really matter. That’s why I said these were the definitions I was using “for the purposes of our discussion.”

          Call my definitions of immersion ‘A’ and embodiment ‘B’ if you’d like.

          Now if we have that settled we can talk about the point of the video, which is that A and B are two different things and are driven by different aspects of the experience. Considering those difference aspects is important to the outcome of what someone is building.

          • René Peinl

            No, it does matter what words to use, even if you are defining them. We have established technical terms so that people know what other people are talking about WITHOUT having to read and remember definitions over and over again. As an XR specialist you are hopefully aware of the cognitive load concept, and what you are doing is increasing the cognitive load without any benefit. Imagine every blog writer redefining terms. Language use is for understanding each other, not confusing. I would expect, that the "world's most senior XR author" would have read some literature, from both academic AND industrial sources. If so, I wouldn't expect you thinking that this article was a good idea.

        • Guest

          He's got the power to reinvent the wheel and learn from the school of hard knocks!

  • Ben Lang

    I’m very curious to hear what you think after reading this article and then playing the game. Have fun!

  • Dan

    Hi, I rarely read reviews everywhere about video games. Anyway if you add “embodiment” to your reviews I would like to read for it when a new review comes out. Thx for your attention

    • Ben Lang

      Thanks! All of our reviews have an ‘Immersion’ score. We use the colloquial term there (because not every reader is going to want to learn these particular distinctions between ‘Immersion’ and ‘Embodiment)’, but that score mostly encompasses the feeling of embodiment as defined in this article.

  • NicoleJsd

    Finally someone else who gets it. It used to be called just presence

    Latency and FOV are crucial things to it and whole valve index was engineered around to maximise feeling of presence. (Hence the amazing speakers directional sound)

    People who only used quest have no idea what it is which is sad because it is unbelievably cool feeling. You try to explain to them but it’s like explaining colors to a blind person

    • psuedonymous

      Presence was achieved many years before development work on Index started. It was achieved with pre-DK2 tracked DK1 demos, and both CV1 and Vive could achieve it in practice as long as developers did not screw up (e.g. breaking orthostereo by messing with the horizon).

      Needless to say, Quest 1 could easily acheive presence, not to mention 2, 3, and Pro. It is not some special provision of the Index alone.

  • g-man

    Good article (again), thanks. It’s interesting you threw in the bit about presence at the end because I was thinking about it since the paragraph where you defined your terms.

    I define them slightly differently. Immersion is when the media takes over or engrosses your consciousness, which can be something like VR or even just being really engrossed in a movie on TV. Presence is the sense that you are actually in that location rather than your real world location. Embodiment is the feeling that you are the protagonist, the one doing the things you see.

    You can be immersed without feeling like you’re there, and you can have presence without embodiment, for example in third person VR adventures where you’re “there” but are more like the camera than an actual entity in the game.

    Anyway just some pedantry for you, great stuff :)

  • The game certainly makes good use of things… that have already been done in tons of VR games before them. Nothing new. Any game that lets you climb allows you to use grip cover. Telekinesis has been in shooters since “Psi-Ops: The Mindgate Conspiracy” back in 2004. Half Life 2 made it very physics based. The only innovation in Synapse was leveraging eye tracking, which only PSVR2 games really can, at this time.

    Also, what’s with renaming “VR” as “XR”? You too cool for “VR”? Too passe? Need something more pretentious?

  • Stephen Bard

    The most dramatic sense of “embodiment” I have experienced in VR is the realtime realism I felt in the Quest 3 version of Red Matter 2, when, as I walked around, I saw realtime dynamic reflections from every surface, specific to their texture/shininess, and dynamic shadows of my moving arms. Alas, this has spoiled me for other games, and I am always disappointed that other standalone games don’t give me this shiver of realism.

    • ViRGiN

      I think my experience was games where you can see your own shadow casting from some light source nearby.

  • Joemich

    The phrase that captures immersion is "you're really there"
    The phrase that captures embodiment is "you're really there"
    Don't @ me. I know they're the same.
    The difference is, when you reach a state of immersion or presence, you feel you're really there
    When you reach a state of embodiment, you feel you're really there.
    Embodiment is all about using interactions, narrative, controls that bring YOU into the scene. Your hands, your body, your gaze, your movements, your world around you reacting to you.

    • Ben Lang

      This is a really interesting way of putting it!

  • David Barlia

    @benz145:disqus Thanks for bringing these features to light. I haven't got a PSVR2, so may never get the chance to play Synapse — but I can easily see how these features would be great for embodiment/presence. Terrific design ideas. Glad I caught this video, for sure!