IIRC that happier people tend to (unrealistically) personalize successes and externalize failures. I.e. if it worked it was because I did it, if it didn't work

IIRC that happier people tend to (unrealistically) personalize successes and externalize failures. I.e. if it worked it was because I did it, if it didn't work then everything else conspired against it. See http://en.wikipedia.org/wiki/Depressive_realism http://en.wikipedia.org/wiki/Depressive_realism