When asked about the Fed's diligence in protecting consumers, Bernanke acknowledged that "we were late in addressing the subprime lending problem," referring to the risky mortgages and dubious lending practices that powered the housing boom and contributed to its crash. "We have to take some heat for that."
Still, Bernanke made the case — as he did last week on Capitol Hill — that consumer protection oversight should stay with the Fed. An Obama administration proposal would create a new consumer protection agency overseeing mortgage, credit cards and other financial products, stripping the Fed of some of its duties.
Of setting up such a new agency, Bernanke seemed to soften his earlier stance, saying, "I'm neither opposed to it or in favor or it."
When Lehrer said some people think the Fed is the fourth branch of the government, Bernanke responded, "That's a tremendous exaggeration."
He said the Fed's independence from political interference in setting interest rates to influence economic activity is crucial. "You get much better results" for the economy when this is the case, he said. "We're very, very sensitive to this issue."
Asked about President Obama's $787 billion stimulus package of tax cuts and increased government spending, Bernanke said most of the money will flow in 2010 so "it might be a little bit early" to judge its effectiveness.
Although big budget deficits couldn't be avoided this year and next, given government efforts to help the economy, Bernanke urged Congress to develop a plan now to bring back "fiscal sanity."
On the economy, Bernanke repeated the Fed's forecast that unemployment will probably top 10 percent this year, even as the economy starts growing again in the second half of 2009. The jobless rate is now at a 26-year high of 9.5 percent.
In a "few years" the economy will be back on track and "growing strongly again," Bernanke said. "It will take some patience."
The Fed, he said, "has been putting the pedal to the metal" to turn the economy around. Inflation, meanwhile, will remain "quite low" for the next couple of years, Bernanke said.
Given the outlook for a slow recovery, companies won't be in a position to jack up rates or feel inclined to beef up workers' wages, he said.
Bernanke's appearance on the program is part of a broader campaign, unusual for a Fed chairman, to reach out to ordinary Americans.
In March, Bernanke granted a rare TV interview, appearing on CBS' "60 Minutes." "I'm answerable to the American people," Bernanke told the audience at the town hall meeting.
His efforts to explain the Fed's actions to get the economy and financial markets back on firm footing comes as the clock ticks on Bernanke's term as Fed chief. His term expires early next year, and President Barack Obama has not said whether he will be reappointed.
The Fed chief, who took the helm on February 2006, has been on the front lines of efforts to battle the financial crisis and end the recession, the longest since World War II.
His aggressive and unconventional actions — including supporting the bailout of AIG to the tune of more than $180 billion — have been credited with averting a financial catastrophe last year but also have touched off anger from the public and lawmakers on Capitol Hill about helping financial companies that made reckless gambles.