> Retail stores also use sound and music to manipulate the environment. A study from the early 1980s showed that slow-tempo music led to shoppers moving more slowly through the store and spending more money than if fast-tempo music played.
I wonder how big this sample size was. The linked study is locked behind a login. The public page indicates maybe it was only 52 stores and it was done by surveying the managers of the store. They even explicitly mention it was a "belief". Too bad the next few sentences are behind a login because it sounds like that would shed more context.
One of the local grocery stores here will play a bunch of 80s hits. They play Eye of the Tiger regularly. That song is one of the most purpose driven songs ever. If you had a mission to pick up 7 items in your list you can be sure you'll be done in record time.
I will say this though, I've absolutely stayed longer in a store because I wanted to wait until I heard a specific part of a song but that feeling is completely unrelated to buying things.