Definition

Adding a deliberately inferior third option to make one of your two main options look better by comparison. Basically marketing psychology's version of a optical illusion.

Example Usage

We added a 'Good' tier between 'Basic' and 'Premium' so most customers skip straight to Premium.

Origin

Discovered in behavioral economics; popularized by Dan Ariely

Fun Fact

Movie theater popcorn pricing uses the decoy effect: a large costs only 50¢ more than medium, making it seem like the best value.

Source: Behavioral economics and pricing psychology

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