That old stereotype that internet users are isolated and anti-social is getting harder and harder to justify, ReadWriteWeb reports. In fact, the latest study from the Pew Internet and American Life Project, aptly titled “The Social Side of the Internet,” challenges this notion even further, finding that internet users are actually more active in voluntary groups and organizations than non-internet users. According to the research, 75 percent of all American adults participate in some group activity. But the difference between internet users and non-internet users is rather striking, with 80 percent of the former and only 56 percent of the latter active in groups. The research found that social media users are even more likely to be group participants: 82 percent of social network users and 85 percent of Twitter users are, for example. The survey finds that most Americans see the internet as having a major impact on groups’ organization, communication, and effectiveness…