This is the VOA Special English Health Report.

As sure as honey attracts bees, Valentine's Day attracts scientists with studies about human relations.

For example, in recent days, researchers announced new findings about online dating sites. These are now among the most popular ways for singles to meet. Many sites say they have a special formula to find the perfect partner. But the researchers say these claims are unsupported and likely false.

Lead author Eli Finkel at Northwestern University in Illinois said online dating is a great addition to the ways for singles to look for love. But the study found that so far there is no scientific evidence that any formula or "matching algorithm" actually works. The study is being published in the journal Psychological Science in the Public Interest.