Some 13% of online adults in the US say they use Twitter, up from 8% who said so in November 2010, according to a new report by Pew Research. Meanwhile, Twitter use among men has doubled, from 7% in November, to 14% in May 2011.

Below, additional findings from the 2011 Twitter report, issued by the Pew Research Center's Internet & American Life Project and Project for Excellence in Journalism.

Adoption Highest Among Non-Whites

Fully one in four surveyed online African-Americans (25%) say they use Twitter at least occasionally (up from 18% in November) and 11% do so on a typical day.

Online Latinos remain strong Twitter users: 19% use Twitter (up from 13% in November) with roughly 5% doing so on a typical day.

Use Among Men Doubles

More men are using Twitter: 14% of Twitter users are now men, compared with 11% of women.  By contrast, in November 2010, women (10%) were more likely than men (7%) to use Twitter.

Twitter still remains popular among younger adults and those with a college education: 18% of Internet users age 18-29 use the microblogging site (up from 14% in November), as do 16% of those with a college degree.

Twitter use has doubled, however, among online adults age 25-34, to 19% in May 2011, from 9% in November.

Among those age 35-44, adoption has also grown significantly, to 14%, from 8% in November.

Mobile use is strong: 95% of Twitter users say they own a cell phone and 54% report accessing the service via mobile phone.

About the data: Findings are from a national survey conducted via landline and cell phones, in English and Spanish, among 2,277 adults age 18+ from April 26 to May 22, 2011.The report, Twitter Update 2011, was authored by Aaron Smith, Pew Internet & American Life Project, June 1, 2011, accessed on June 6, 2011.