The study found that for people who are lonely or sad, listening to music helped them.

Wow. How utterly expected.

Next, they will do studies and find that people who are lonely or sad, are helped when they attend a concert with their favorite band.

Or when they eat their favorite food.

"After two years of studies, we conclude that people who are feeling lonely or sad, eating their favorite food gives them a boost and feel better".

The metric that would be useful is "better" for how long?