Let's hear it for "co-presence"!
Postman, 1995: “When two human beings get together, they're co-present, there is built into it a certain responsibility we have for each other, and when people are co-present in family relationships and other relationships, that responsibility is there. You can't just turn off a person. On the Internet, you can. And I wonder if this doesn't diminish that built-in, human sense of responsibility we have for each other. Then also one wonders about social skills; that after all, talking to someone on the Internet is a different proposition from being in the same room with someone--not in terms of responsibility but just in terms of revealing who you are and discovering who the other person is. As a matter of fact, I'm one of the few people not only that you're likely to interview but maybe ever meet who is opposed to the use of personal computers in school because school, it seems to me, has always largely been about how to learn as part of a group. School has never really been about individualized learning but about how to be socialized as a citizen and as a human being, so that we, we have important rules in school, always emphasizing the fact that one is part of a group. And I worry about the personal computer because it seems, once again to emphasize individualized learning, individualized activity.”
http://www.pbs.org/newshour/bb/cyberspace/cyberspace_7-25.html

