"We really need to look more closely at the effects of smoking and nicotine, not only on physical health but on mental health, too," says Richard A. Grucza.  "We don’t know exactly how smoking influences suicide risk. It could be that it affects depression or increases addiction to other substances. We don’t know how smoking exerts these effects, but the numbers show it clearly does something." (Credit: Kevin Standlee/Flickr)
Top StoryWashington University in St. Louis

Suicides decrease when cigarette tax goes up

People were more honest about their symptoms, no matter how potentially embarrassing, when they believed that a human observer wasn't in on the conversation, says Gale Lucas. "In any given topic, there's a difference between what a person is willing to admit in person versus anonymously." (Credit: Matt Majewski/Flickr)
Top StoryUniversity of Southern California

Patients tell more secrets to virtual humans

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