(For gay couples, it's more like two out of every three).
The apps have been surprisingly successful -- and in ways many people would not expect.
In fact, people who meet their partners online are not more likely to break up — they don’t have more transitory relationships.
Once you’re in a relationship with somebody, it doesn’t really matter how you met that other person.
Is it creating a new reality in which people actively avoid real-life interactions?
Of course, others have worried about these sorts of questions before.
On her screen, images of men appeared and then disappeared to the left and right, depending on the direction in which she wiped.
I felt a deep sense a rejection -- not personally, but on behalf of everyone at the bar.
The interview has been edited for length and clarity.
You have one of the most unique data sets about modern romance. Well, one of the first things you have to know to understand how dating — or really courtship rituals, since not everyone calls it dating — has changed over time is that the age of marriage in the United States has increased dramatically over time.
"And mostly they're pretty unfounded." Rosenfeld, who has been keeping tabs on the dating lives of more than 3,000 people, has gleaned many insights about the growing role of apps like Tinder.
They are important today — roughly one of every four straight couples now meet on the Internet.
That's something not everyone thinks this is a good thing. The worry about online dating comes from theories about how too much choice might be bad for you.