Science backs up the powerful psychology of scent

While there isn't conclusive evidence that pleasant aromas directly increase sales, some research indicates a connection between enjoyable scents and a customer's willingness to spend more. A 2012 collaborative study by researchers from Washington State University and the University of St. Gallen in Switzerland revealed that shoppers exposed to a "simple" scent, as opposed to a complex one or no scent at all, tended to spend approximately 20 percent more on average.
More definitive than the potential influence of scent on consumer behavior is its capacity to evoke specific memories, particularly those tied to strong emotions. Neurobiologists at Harvard Medical School explain that olfactory receptors in the brain transmit powerful signals to critical areas associated with learning, emotion, and memory, especially the hippocampus. This region can identify when a scent is linked to a strong emotional experience and can retain that information "indefinitely." This connection is what chain restaurant owners are relying on to create an association between their offerings and feelings of desire and nostalgia.
Since chain restaurants prioritize consistency and dependability, they often replicate their scents across different locations, facilitating an immediate emotional reaction. Similar to how they have replaced cashier interactions with digital kiosks for checkout, employing scent marketing is another strategy these establishments use to foster customer loyalty and encourage increased spending.
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