During the summer of 2008, the eminent Notre Dame sociologist Christian Smith led a research team that conducted in-depth interviews with 230 young adults from across America. The interviews were part of a larger study that Smith, Kari Christoffersen, Hilary Davidson, Patricia Snell Herzog and others have been conducting on the state of America’s youth.

Smith and company asked about the young people’s moral lives, and the results are depressing.

It’s not so much that these young Americans are living lives of sin and debauchery, at least no more than you’d expect from 18- to 23-year-olds. What’s disheartening is how bad they are at thinking and talking about moral issues.

The interviewers asked open-ended questions about right and wrong, moral dilemmas and the meaning of life. In the rambling answers, which Smith and company recount in a new book, “Lost in Transition,” you see the young people groping to say anything sensible on these matters. But they just don’t have the categories or vocabulary to do so.

When asked to describe a moral dilemma they had faced, two-thirds of the young people either couldn’t answer the question or described problems that are not moral at all, like whether they could afford to rent a certain apartment or whether they had enough quarters to feed the meter at a parking spot.