The signs of full-blown depression are usually more severe and last longer.

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Our entire auto industry was on the verge of collapse and, all told, the prospects of us going into a full-blown depression were very real.

WHITEHOUSE: President Obama Speaks at National Governors Association Meeting | The White House

But nearly 50% of the teens were said to have experienced symptoms of depression or a full-blown mood disorder, according to the study, which was presented on Saturday at an annual meeting of the American Academy of Pediatrics, in New Orleans.

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Finally, a strong middle class can only exist in an economy where everyone plays by the same rules, from Wall Street to Main Street. (Applause.) As infuriating as it was for all of us, we rescued our major banks from collapse, not only because a full-blown financial meltdown would have sent us into a second Depression, but because we need a strong, healthy financial sector in this country.

WHITEHOUSE: President Obama Speaks on the Economy