What is the anchoring effect in UX design?
The anchoring effect is a cognitive bias in which the first piece of information a person encounters on a topic, the anchor, has a disproportionate influence on their subsequent judgments, even when the anchor is arbitrary or irrelevant. In UX design, anchoring is most directly relevant to pricing interfaces, comparison tables, and any context where users must evaluate numbers or make relative judgments. The first price a user sees becomes the reference point against which all subsequent prices are evaluated.
How does anchoring appear in interface design?
Pricing tables that show the most expensive plan first make the middle option feel more reasonable by comparison. Showing an original price crossed out next to a sale price uses the original price as an anchor that makes the discounted price feel like greater value. In negotiation contexts, showing a high initial value before asking users to counter makes higher outcomes more likely. Default values in input fields act as anchors that influence the values users enter. The order of options in a list can anchor users toward whichever option appears first, particularly when options are otherwise similar.
What are the ethical considerations of anchoring in UX?
Anchoring is a powerful tool that can be used ethically or manipulatively. Using anchoring to help users understand the relative value of pricing options is a legitimate design pattern. Using anchoring to exploit users into paying more than they intended or to obscure the true cost of a product is a dark pattern. The distinction lies in whether the design genuinely helps users make better decisions for themselves or whether it exploits their cognitive limitations to serve business interests at users' expense. Choice architecture that uses anchoring transparently and in users' interests is distinct from manipulation.