Hidden messages that promote products in films once caused a moral panic. But is the much-feared technique really effective? The BBC's Phil Tinline helped devise an experiment to find out. On 12 ...
In 1957, Vance Packard published his best-seller The Hidden Persuaders, in which he described how a New Jersey movie theater had flashed subliminal messages to "Eat popcorn" and "Drink Coca-Cola", ...
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