- 简介: Use of social networking sites has risen rapidly since 2005, and the major services, particularly Facebook, continue to attract new users at an astounding rate (Corbett, 2009). University-level students are among the most vigorous adopters of social networking sites, with the 2008 US-based Educause Center for Applied Research (ECAR) study reporting that 85% of students use them on a daily basis (Salaway, Caruso & Nelson, 2008) compared with only 14% of the general population (PEW, 2009). Email has a long history of use and is a core communication tool for the majority of computer users. According to recent data, 44% of American adults now send or read email on a typical day––up from 40% in 2006–07 and 33% in 2004–05 (PEW).
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