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However, the Internet is not merely the Swiss army knife of communications media. It has other critical differences from previously available communication media and settings (see, e.g., McKenna & Bargh 2000), and two of these differences especially have been the focus of most psychological and human-computer interaction research on the Internet. First, it is possible to be relatively anonymous on the Internet, especially when participating in electronic group venues such as chat rooms or newsgroups. This turns out to have important consequences for relationship development and group participation. second, computer-mediated communication (CMC) is not conducted face-to-face but in the absence of nonverbal features of communication such as tone of voice, facial expressions, and potentially influential interpersonal features such as physical attractiveness, skin color, gender, and so on. Much of the extant computer science and communications research has explored how the absence of these features affects the process and outcome of social interactions.
