A third of American adults now own a tablet computer, double the number of a year ago, according to the Pew Research Center.
The survey found that 56 per cent of households earning more than $US75,000 have a tablet, making it the biggest category of device owners. Adults in the 35-44 make up the biggest tablet-owning age group (49 per cent).
By contrast, smartphones are much more popular with younger adults. Those in the 18- to 34-year-old category own the most smartphones in the U.S., Pew said last week.
Pew interviewed 2,252 adults, age 18 and older, in April and May. A Pew survey in May 2010 found that just 3 per cent of adults owned a tablet. The tablet-owning number jumped to 8 per cent in May 2011 and to 18 per cent in April 2012. Tablet ownership reached 34 per cent in the latest survey.
The latest survey found that 33 per cent of respondents between age 18 to 24 owned a tablet and 37 per centof 25- to 34-year-olds owned one. Only 18 per cent of respondents over age 65 own a tablet, the survey found.
Other findings in the study:
Tablet ownership among parents with minor children living at home rose from 26 per cent in April 2012 to 50 per cent in May.
Tablet ownership by adults in households making $75,000 a year rose from 34 per cent to 56 per cent over the past year.
Tablet ownership rose from 28 per cent to 49 per cent of college graduates in the same period.