In the 1890s, Russian physiologist Ivan Pavlov noticed how dogs began salivating not just when food was placed in front of them, but when they heard the footsteps of the person bringing the food.
He ran experiments where he’d ring a bell right before he fed his dogs. After repeating this several times, the dogs started salivating at the sound of the bell alone, no food needed.
Pavlov had identified classical conditioning, or learning to associate one stimulus (the bell) with a different stimulus (the food) to produce a conditioned response (salivation).
Now, I like to think I’m a little bit more evolved than those dogs. I’d hope I wouldn’t fall for the same tricks. But I do. In fact, we all do.
The Real Reason You Love That New Car Smell
Take the “new car smell” as my first example. No one is born liking this smell. Instead, we learn to like this smell through repeated associations. That new car smell becomes associated with the pleasurable experience of sitting in a shiny, clean new car.
Yet this association can be hacked to alter our perception.
Charles Spence, in his terrific book Sensehacking, describes how Rolls-Royce customers sent their cars in for service, and they returned to their owners seemingly brand new. Rolls-Royce managing director Hugh Hadland is quoted as saying, “People say they don‘t understand what we’ve done, but that their cars come back different and better.”
How did Rolls-Royce deliver this incredible service?
Apparently, by spraying the car with an aromatic mixture of leather and wood designed to capture that distinctive new car smell. The scent has become so iconic that the brand that can help keep a Rolls-Royce smelling great for longer.
It’s a perfect example of classical conditioning at work — this time on humans. It’s the same formula. We learn to associate one stimulus (new car smell) with another (a new car), producing a conditioned response (believing you’re sitting in a new car).
It’s not the only associative hack pulled off by car manufacturers.
One found that students overestimated a car’s speed when the noise of the car was artificially increased. Likewise, one found that lowering the in-car noise by five decibels led people to underestimate its speed by 10%.
This is because over time, we’ve built an association between sound and speed. F1 cars make deafening noises, as do jet planes. We have learned to expect that fast cars do the same. So it’s no surprise that some Volkswagen Golf models use sound actuators to help boost the roar of the engine.
From Beer Logos to Air Conditioning — Association Drives Sales
There’s another association spotted by Charles Spence in Sensehacking that’s far too common to be a fluke: beer brands and stars.
Dozens of beer brands seem to include a star shape in their logos: think Estrella, Heineken, Newcastle Brown Ale, and Sapporo. Bintang’s star is visible across most of Indonesia, and in Nigeria, one of the top-selling beers is literally called Star Lager.
Why this link between stars and beer?
Well, Spence says it's due to how we associate carbonation and bitterness with angularity. A star’s angular shape nudges us to think of a refreshing, cold, carbonated beverage.
These attempts to hack our associations aren’t just used by fast cars and beer brands — even luxury stores selling premium goods do the same.
Take Lisa Heschong’s research for her 1979 book Thermal Delight in Architecture. She found that luxury brand stores are, on average, significantly colder than non-luxury stores. In other words, Harrods is colder than Selfridges, and Rolex is colder than Target.
Heschong claims that this deliberate cooling originated from a time when air conditioning was a luxury that could only be afforded by the wealthiest establishments. And it seems as though stores are still leveraging this association today.
Making Connections That Sell
While I may hope to be immune to the tricks Pavlov played on his dogs, it’s clear from the research that I’m just as malleable. I’ll salivate at a fast food brand's jingle, flinch when I hear a loud engine, and crave a refreshing star-adorned beer. Savvy marketers use that power to sell better.
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