Which psychological discovery about color in product packaging led to a revolution in marketing during the 1940s?

Product packaging is a silent salesperson, and color plays a crucial role in consumer decision-making. In the 1940s, one major innovation in packaging psychology transformed how brands approach color selection. This discovery fundamentally changed marketing strategies and continues to influence product design today. Test your knowledge about this pivotal moment in the intersection of consumer psychology and product packaging design.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

The 'Isolation Effect' (Von Restorff Effect) - items that stand out from their surroundings are more likely to be remembered
The 'Golden Ratio' application in packaging proportions for maximum visual appeal
The 'Stroop Effect' - conflicting color-word associations increase consumer attention
The 'Zeigarnik Effect' - incomplete or asymmetrical designs create tension that drives purchase decisions