Support for President Bush's plan to create personal Social Security (search) retirement accounts which might include stocks or mutual funds has dropped over the last month among Americans under age 30, according to a poll released Thursday.

Young adults have been the strongest supporters of the proposal for months. Support among those 18-29 dipped from seven in 10 to just under half, according to the poll by the Pew Research Center for the People & the Press (search). A quarter of young adults now say they're not sure how they feel about such personal accounts.

The poll found that just over four in 10, 44 percent, of all those polled, support creation of the accounts, down from 54 percent in December, while 40 percent are opposed.

The amount of support for the plan differs widely depending on how the question is worded.

When poll questions mention that people will have a reduced guaranteed benefit with the accounts, the support dips into the 30s with a majority opposing the plan. When the question emphasizes only the positive aspects of accounts, some GOP polls have found a majority supporting accounts.

Polls find a healthy majority agree that Social Security faces long-range problems.

The Pew poll of 1,505 adults was taken March 17-21 and has a margin of sampling error of plus or minus 3 percentage points.