Contrast Effect
Our perception of something is influenced by what it's compared against.
A contrast effect is the enhancement or diminishment, relative to normal, of perception, cognition, or related performance as a result of successive or simultaneous exposure to a stimulus of lesser or greater value in the same dimension. In consumer behavior, a medium-priced wine appears excellent when flanked by a very cheap and a very expensive option; on its own it would seem average.
What it looks like in the wild.
- Marketing Pricing Tiers A 'Pro' tier at $29/mo looks reasonable when an 'Enterprise' tier at $299/mo is shown beside it.
- Everyday life Dating App Profiles Attractiveness ratings shift based on the photos shown immediately before — a neutral face seems more attractive after unattractive faces.
Someone has already built a business on this.
Biases are not only private errors. They are design targets — patterns deliberately engineered into interfaces because they reliably work.
- E-commerce Decoy Pricing Products are deliberately priced at three tiers where the middle option is designed to seem like the obvious value choice, steering consumers away from the cheapest option.
Recognising a definition is not the same skill as spotting it.
Two scenarios from the app, with distractors drawn from the same family of biases — which is what makes them hard.
A person perceives their clean car as dirty after driving a brand-new vehicle off the lot, even though their car is well-maintained and recently washed, because the pristine new car creates a contrast that makes their own spotless vehicle seem worn by comparison.
After tasting an incredible home-cooked meal, a person perceives their own cooking as bland, even though they are a competent cook, because the exceptional meal creates a contrast that suppresses the perceived quality of their own culinary abilities in comparison to the superior dish.
Biases rarely arrive alone.
Understand more. Assume less.
188 biases, 18,869 scenarios, and a record of how you actually decide.
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