journalist susannah cahalan talks about her book, the great an experimentut to test the legitimacy of psychiatric hospitals. ♪ >> a group of colleagues and i gained admission to psychiatric hospitals in simulating by faking a symptom -- a simple system. we said we heard voices. .he voices said, empty, dull the moment we were admitted to the hospital, we

journalist susannah cahalan talks about her book, the great an experimentut to test the legitimacy of psychiatric hospitals. ♪ >> a group of colleagues and i gained admission to psychiatric hospitals in simulating by faking a symptom -- a simple system. we said we heard voices. .he voices said, empty, dull the moment we were admitted to the hospital, we abandoned our symptom, and we behaved the way we usually behave. the question was, would anyone detect we were sane? the answer was, no. >> your new book, the great pretender, centers around the story of this man. who is he? susannah: he is a stanford professor named david rosenhan. he was the architect of this study. inis called on being sane insane places. he and seven other people went undercover in psychiatric hospitals around the country. their mission was to test the nature of diagnosis to see if their sanity would be detected. as he said, they were not. >> the study was done in the early 1970's. why are you interested in it today? susannah: it came from a personal place. i emerged from my book, my memoir, brain on fire, which

journalist susannah cahalan talks about her book, the great pretender, about an experiment to test the legitimacy of psychiatric hospitals. then of form on venezuela with former ambassadors talk about security and influence in the country. ♪ >> a group of colleagues and i gained admission to psychiatric hospitals in simulating by faking a symptom -- a simple system. we said we heard voices. the voices said, empty, dull. thud.the moment we were admitted