The concept of subliminal advertising first began in 1957, when James Clever, a market researcher, claimed that when he was showing picnic in a New Jersey movie, he interspersed pictures of words such as "drink Coca-Cola" and "eat popcorn" that flashed quickly in the film. It found that sales of Coke and Blast Valley in theaters grew by 18.1% and 57.5%, respectively.
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