"If there's one topic we all talk about, it's real estate," Mr. Becherer said.
So the variety of opinions expressed in a package of letters about one topic should not be read as poll results, but rather as a sampling of reader responses.
Many people have one topic they know enough about to be able to teach others.
If a reader happens to like a post about one topic, the platform will recommend other similar ones to them.
I can't imagine doing the same with a sort of 'twitter for shopping" it would just be too boring because it would just be about one topic, shopping.
To have the project be about one topic, there aren't many records you can find that have one theme.
Intriguingly, the film released this weekend -- and the book upon which it's based -- has a lot to say about one topic in particular: human sin.
Instead, it appeals to the horns effect, a thinking error where negative emotions about one topic - in this case, terrorism perpetrated by radical Islamic extremists - gets spread to all Muslims, regardless of the irrationality of such thinking.
Using social network analysis as a visualization technique, Kimmerle, Moskaliuk, Harrer, and Cress (2010) compared the development of Wikipedia articles about one topic with the individual development of the authors who contributed to these articles (for visualization of Wikipedia data, see also Brandes & Lerner, 2008; Viégas, Wattenberg, & Dave, 2004).
She wrote about only one topic: love.
