At these events it is common for the audience, effectively a self-selecting group of admirers, to tell the author how much they like the book.

Any evidence for this, apart from a small number of anecdotes from a self-selecting group?

The 2 percent or so who do are a self-selecting group.

An alternate explanation might be that the self-selecting group that responded was more did so in part because they were aware of these issues.

To be sure, it's a self-selecting group that makes it for the long haul.

To some extent, it was a self-selecting group.

"It ends up being a self-selecting group," she said.

It's already a self-selecting group of people who were not so prurient to begin with.

Communities of amateurs still thrive, but they are self-selecting groups.

But the rigor of these self-selecting groups varies, and most of their work goes on behind closed doors.