Virtual phobias, real fear
A big question for a lot of people was if the spiders are virtual, will they be scary, because it has to be realistic enough to create a fear response for the therapy to work. We use a couple of wires that you can put on a person’s finger and hook them up to a tablet or a cell phone. This provides an online measure of a person’s autonomic sympathetic response.
Like a lie detector test?
Exactly. We put that on their fingers and exposed them to a real-life tarantula and to our virtual tarantulas, and the fear response was no different. That means these do create an objective fear reaction in the body.
We also had people who said, “I know this is not real. I won’t be scared.” And when we started the therapy, it was with a tiny spider 5 meters away from them, and they’d lift their legs off the floor.
With the treatment, we’d come to one room and start with a very little spider, far from them. Then gradually we move them up to bigger, more diverse types of spiders, which are moving around. The patient comes near and tries to touch them.
Then at some point, I’d put a spiderweb on the door, put a few spiders on that, open the door, and have the patient walk through it. They kept walking through this spiderweb.
When they were desensitized to these spiders in this context – and as I said, context is important – we’d go to another room. This was darker, more like a basement, and we’d continue the same thing. That would actually take much less time because they already had desensitized a lot.
In our field, sense of control is very important, especially for when a patient goes home. So at the end, I’d leave the room and talk to the patient via a baby monitor. The patient was surrounded by 20 tarantulas, without the prompt moving around the environment.
Now that they’re desensitized to my virtual spiders, the question is, how would that apply to a real spider? So, we had a real live tarantula, whose name was Tony Stark, because we’re the STARC lab. We’d put Tony at the end of a long hallway before the treatment and see how close the patients could get to him.
It was only one treatment session; nobody’s was longer than 1 hour, and the average treatment time was 38 minutes.
That’s pretty effective.
It’s pretty good, compared with other studies. And I believe this is because of all the components I mentioned: being able to use your real environment; combining it with the real tarantula; the variety of the types of the feared objects; and, of course, giving the patient a sense of autonomy at the end.
Then we had to see how prolonged the effects are. We had them come in 1 week and 1 month after the treatment. I’d remind them of the principles of good exposure therapy and ask them to keep practicing at home between the sessions, looking at pictures and videos. But we never tested who did or did not do it.
After 1 week and 1 month, the effects were either the same or better. A larger number of people at 1 month were able to touch the tarantula than right after treatment.