Why can slower store music nudge shoppers toward more buying than fast music?

Answer: Slower shopper pace

Slower shopper pace ✓ — Right: the key mechanism is pace. A classic supermarket study found slow tempo reduced traffic speed and was associated with higher sales, and later retail-music studies also treat tempo as a cue that can change movement, browsing, and purchase behavior. The surprise is concrete: a slower tempo can change how people move, not just what mood they report.

Calmer shopper mood — Mood is plausible because music can change how a place feels. But the useful retail mechanism here is more concrete: tempo can change movement speed and browsing time. The answer is not just that people feel calmer; it is that they move through the store differently.

Richer store atmosphere — Richer atmosphere is plausible because music helps a store feel less bare. But the tempo finding is more specific than atmosphere in general: slower music can slow movement and extend browsing. The buying nudge comes from changed pace, not just a fuller-feeling room.