Amber Case spends a lot of time studying and thinking about how digital extension affects our brains and behaviors. "The brain doesn't really need that much stimulus in order to create a virtual reality," she says. In early computing, "we thought it would take much more to incite people into these realities," but text and good two-dimensional interfaces are enough to absorb us totally in virtual worlds. "It's mixed reality, where you can be anywhere and you have different virtual realities going on around you – the different tabs in a browser window, text messages you get, Facebook messages, Twitter messages. All of those are different realities in simultaneous time zones that people are living in all the time, and we switch rapidly between these contexts all the time. People are living multiple virtual realities while existing in one reality at a time."
I asked about the overhead for all the virtual switching we do as we bounce from one to another reality, referring to it as "virtual jet lag." "To be fully aware of an environment and take something in that is not fragmented is important for learning and embodying knowledge," she says. "But the problem on the Internet is, say you learn something on Wikipedia; you're not embodied in that knowledge. Rather than learning in a lab, you're reading something about biochemistry on Wikipedia, learning it there. And halfway through the article, you may be checking your email or looking at Facebook; it disrupts the writing of that memory to your brain." This leads to greater fragmentation of memory than we might otherwise experience. "By the time you've finished loading that memory, you've only loaded part of it," she notes. "And if you stay up late, don't get enough REM sleep, your brain can't get through the natural defragmentation process. And you wake up with a sloppy hard drive of a brain."
See also: Amber Case's website Cyborg Anthropology