2009-01-13-皮尤-Adults_and_Social_Network_Websites_17页_200kb

报告摘要

35% of adult internet users in the US had profiles on online social network sites in 2008, a fourfold increase from 8% in 2005.
Compared to teens, who have a 65% usage rate among online teens, adult usage is lower but still growing; however, younger adults (aged 18-24) are more likely to use these sites.
Age demographics show decreasing usage with age: 75% of 18-24-year-olds, down to 7% of those 65 and older.
MySpace is the most popular site among adults, followed by Facebook and LinkedIn.
Adults use social networks primarily for personal reasons, such as staying in touch with friends and making plans, rather than professional uses.
Privacy is a key concern: 60% restrict profile access to friends only, and most believe it is relatively easy for someone to identify them online.
Many users maintain multiple profiles across different sites to compartmentalize personal and professional lives or to keep track of friends on various platforms. About 51% have two or more profiles.
Usage has increased, with more than one-third visiting their profile daily, and adults are increasingly aware of privacy risks but still use these networks extensively.

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