Anchoring Bias

What Is Anchoring Bias

Anchoring bias is a cognitive bias in which the first piece of information encountered (the anchor) exerts an undue influence on subsequent judgments and estimates. In a famous experiment by psychologists Kahneman and Tversky, participants were shown a random number generated by a roulette wheel (either 10 or 65) and then asked, "What percentage of UN member states are African countries?" The group that saw 10 answered an average of 25%, while the group that saw 65 answered an average of 45%. Even a clearly irrelevant number causes the brain to use it as a reference point.

Anchors Lurking in Everyday Life

Anchoring is not a laboratory phenomenon - it influences everyday decision-making across the board. A sale tag reading "Regular price 10,000 yen - Special price 4,980 yen" sets the regular price as an anchor, making the discounted price feel like a "bargain." The first figure offered in a salary negotiation defines the entire range of subsequent bargaining. A property's listing price sways the buyer's judgment of fair value. When the most expensive dish on a restaurant menu catches your eye first, the other dishes feel relatively cheap. All of these are anchoring at work.

Coping with Anchoring Bias

The troubling reality is that research shows simply knowing about the bias is not enough to prevent it. Even experts fall prey to anchoring within their own fields of expertise. Countermeasures include independently establishing your own reference point before making a decision, comparing information from multiple sources, and consciously asking yourself, "Am I being pulled by the first number I saw?" Complete elimination is difficult, but awareness alone can reduce its impact.