After a large decline in March, economic confidence levels among U.S. workers rebounded slightly in April, according to a recent survey of 3,190 working adults. The Spherion(R) Employee Confidence Index, a monthly gauge of overall worker confidence, increased 0.7 points to 57.8 in April. The survey, conducted by Harris Interactive(R) on behalf of Spherion Corporation, shows that workers remained confident about the future of their current employers and personal job prospects, but also revealed over one-third (35 percent) intend to seek new jobs within the next year.