The Randstad employee confidence index rose slightly in September, to a reading of 52.4 from August’s reading of 51.6. The overall index registered 7.6 points higher than September 2011 levels. The index measures workers’ confidence in their personal employment situation and optimism in the economic environment.

Employees are more confident in the future of their current employers and are indicating a higher level of job security than this past August, according to the index.  Fifty-six percent of workers reported that they are not planning to job search in the next 12 months even though more indicated a greater sense of optimism in their ability to find alternative employment.

“The index grew slightly this month to reflect workers sustained confidence in the job market and increased optimism in their personal employment situation,” said Jim Link, managing director of Human Resources for Randstad U.S.

“Despite the subtle rise in the index, workers and employers alike, are still exercising caution when it comes to job searching and hiring. As we approach the fourth quarter, many economists predict to see more of the same when it comes to economic growth until we see more job creation and consumer spending,” Link said.

The index is based on an online survey conducted by Harris Interactive on behalf of Randstad. It surveyed 1,601 employed U.S. adults. The survey took place between Sept. 11 and Sept. 13.