Which pricing psychology phenomenon explains why retailers commonly price products at $9.99 instead of $10.00?

Pricing strategies are more than just numbers on tags. They're carefully crafted psychological tools designed to influence consumer behavior and purchasing decisions. Behind every price point lies research, strategy, and behavioral economics principles that shape how we perceive value. This poll tests your knowledge of one of retail's most fascinating psychological pricing tactics that has become ubiquitous in modern commerce.

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Left-digit effect (consumers focus more on the first digit and perceive the price as significantly lower)
Prestige pricing effect (odd-numbered prices are subconsciously associated with discount products)
Bundle illusion (prices ending in .99 create the impression that multiple items are included)
Fractional distraction (cents create cognitive load that prevents consumers from comparing prices effectively)