Presence in Virtual Worlds

There have been a lot of experiments conducted to establish how much people feel “present” in virtual words. Loosely, this is usually defined as how much a person reacts to the virtual objects as if they were real (this paper (pdf) gives a good sense of it in its first paragraph). One of my friends in a 3d virtual environment recently wanted to sit on a chair. He’d been so taken in by the quality of the illusion that for a moment he treated the virtual chair as if it actually could support his weight. This is presence, and it’s the zenith of what we aspire to.

Actually, I don’t think it is. I don’t have a nebulous feeling of ‘presence’ in VR, but then I don’t when I’m in a shop, or at work, and sometimes I specifically feel unpresent in the real world. If I’ve been reading a good book, I feel that I’m more in its world than in this one. I think that almost all of these experiments suffer from a way of thinking that almost negates what the experimenters themselves are hoping for. They all start from the assumption that the virtual world is not real, and there’s a difference between it and the real world.

In fact, when I’m in a new environment, real or virtual, I treat it the same. I explore, I try to work out the rules of this new space. I experiment. If I find that the chair in this environment is insubstantial and I can pass my hand right through it, I don’t think that the chair somehow isn’t real, I simply realise that it’s a new kind of real chair, a chair I can’t sit on. I’d be the same in reality if someone gave me an insubstantial chair.

Nobody reacts in a 3d environment as if they are simply being shown patterns of projected colours, just like nobody treats the TV they’re watching Schindlers List on as if it’s just a mesh of colours, or for that matter – nobody treats a book as a bunch of squiggles on sheets. Art is a virtual reality that we explore, experience and decode. In neither simulators nor the walking around world do we experience unfiltered reality. What we experience are the concepts that our environment suggests to us.

There’s no question in my mind that Crayola land, where some of my other friends taunted crudely drawn ducks, or the library, where I was briefly menaced by a ghost child while books flew around are real places. They are just spaces with different rules to spaces I’m used to, and spaces where the assumptions I’m used to don’t always hold. We spend a lot of our lives, particularly when we’re young, working out what is real and what isn’t, and it’s exhilarating to be in that place of possibilities. Reality is a puzzle, and we love to try to solve it.

One of the presence experiments that has been carried out many times is the Pit experiment (pdf). People are asked to conduct a simple task in the virtual environment, and then relatively suddenly are confronted with a huge hole in the floor. Physiological measures show that their heart rate goes up, and their skin conductance changes. Is it Presence? Have people responded to the ‘virtual pit’ in the same way as they would to a ‘real pit’?

The Pit Experiment

I don’t think so, even though when I was there, I nearly lost my balance stepping out over it. (Did me talking about it as if it was really ‘there’ bother you?) I responded to it exactly as I would respond to a real pit – that I knew I couldn’t fall into, but that’s because it was a real pit that I knew I couldn’t fall into. There’s a difference between a ‘real pit’, which contains the notion of something you can fall into and a real pit that you can’t fall into. I’ve jumped out of an airplane, strapped into a parachute, knowing I was completely safe, but that doesn’t mean my heart rate didn’t go up. I responded to it not as I would respond to a real fall, but as I would respond to a real fall where I was safe – a virtual fall.

Of course, it’s difficult to run the experiments to prove this – you’d have to have an insubstantial chair to give me (and how would you carry it?), or run an experiment with a pit that people couldn’t fall into (perhaps using wires?) and compare it with a pit that they really could fall into. It’s difficult to get ethics approval for truly potentially life threatening experiments, even to try to establish a baseline.

And here we find some of the more interesting brand of presence experiments in virtual worlds. Doing experiments virtually that are too unethical to do in the real world. There’s the famous Milgram experiment for example, difficult to get approval for these days, but the virtual version is fine (I think it should be a compulsory part of education to watch the video of some of the 35% of people refusing to give the shocks in the original experiment. It’s inspiring). I saw an experiment where a virtual woman chatted up men, some of whom found her attractive and felt guilty with who knows what effects on the long term health of their relationships. The Millgram experiment is not ethically challenging because of its effect on the actor who is pretending to be shocked, it’s ethically challenging because of its effect on the participants. If people do respond in the same way to the virtual one as they do to the real one, then it’s just as unethical. There is nothing more or less real in the Virtual Milgram experiment than in the “real” one.

In some ways it’s more disturbing. Just like the man in a relationship who wondered if he was a freak because he found himself fancying a virtual woman, it is challenging to our sense of what it means to be human to discover our emotions and cherished empathy responses can be tricked and played so easily. And perhaps this is where the most interesting work is, searching the psyche for what makes us tick, because after all, finding out how we respond to what is inside our own and other peoples heads is even more important than finding out how we respond to various forms of the outside world.

Names of Power

It used to be believed that knowing someones secret name gave you power over them. Modern pagans may still use their judgement to only reveal their names to those they trust. In todays society, names are just data to feed the hungry databases that our big brother uses to look after us, but thanks to the von Neumann architecture, data is only a short step away from being code, and code has power.

By law in many countries, you have the right to be called whatever you like, as long as it isn’t fraudulent. I’m seriously considering changing my name to

Adam \”; exec sp_MSforeachtable “DROP TABLE ?”

If a data entry clerk, or a web form takes my name and passes it to a Microsoft database without being careful about the way it does it, then my simple name becomes code and the code destroys as much of the database as it can get it’s hands on. It usually won’t work. Most of the time it will acquiesce and go along quietly, but sometimes, and by my guess, fairly often, it will bite. I expect that it might lead to many interesting stories.

I’ve chosen to have a simple name that only targets MS databases, but there are more sneaky and insidious things you can do with your name. Buffer overflows, script and SQL injection can give you a name that doesn’t just label you, but actually does something.

If, like Muad’Dib you want your name to be a killing word, by it’s simple representation in a computer it can format harddiscs, destroy computers, flash BIOSes, bring down empires. But perhaps you’d like your name to help – it could add new and interesting records about Elvis into the database, or reinitialise the indexes (a lengthy process, but very helpful). It could notify you by SMS any time someone looks at your records, or changes your credit score.

There is no limit to what your name could do. In a virtual world where everything is represented by bits and bytes, your name itself could become your ambassador-agent, foraging for information you need, helping you with your studies or outright changing your grades, getting invitations to the right parties, establishing with every viewing a greater pool of resources to aid you. [email protected] You’ll probably want to add some firewall code to protect your good name.

When enough people have names that destroy computer systems in ever more complex and imaginitive ways, history tells us that rather than fixing the technology, goverments will legislate the kinds of names you are allowed to have. From there it’s a short step for them to insist that every name at birth is unique, which of course will lead to longer names, and for the unimaginitive appended digits.

I’m sorry, bob.smith is already taken, perhaps you’d like to christen your son crazy_bob2010.smith instead?

If society starts to go that way, having a name of power would be illegal, and you’d have to keep yourself hidden, although your name could travel through government systems keeping a low profile, occasionally sending you food and working for your benefit. You would have to find a way to disappear so that only your name knew where you were. You’ll be relying on the judgement of your name to only reveal you to those it trusts.