Imagine a jacket labeled:
Regular price: $200.
Sale price: $110.
The $110 price can feel like a bargain because your brain has already seen $200.
Now imagine seeing the same jacket at another store for $90 before seeing the $110 version.
Suddenly $110 may feel expensive.
The product is the same.
The reference point changed.
This is called anchoring
When people make judgments involving numbers, the first number they encounter can influence later estimates.
That first number becomes an anchor.
The brain may adjust away from it, but often not completely.
Why does the original price matter?
A high original price makes the current price look smaller by comparison.
Retailers know this.
That is why sale signs often emphasize both numbers.
The first number gives the second one context.
Does anchoring work even when the first number is arbitrary?
It can.
Research on anchoring has shown that even numbers that should not contain useful information can influence later numerical judgments.
The brain likes having a starting point.
It does not always stop to ask whether the starting point deserves the job.
Where else does anchoring show up?
Negotiations.
Home prices.
Salary discussions.
Restaurant menus.
Subscription plans.
Legal damages.
Any situation where people are deciding what number feels normal or reasonable can be influenced by an early reference.
Does the anchor control the decision?
No.
People can reject anchors.
Experience, research, and competing information matter.
A shopper who knows what the product usually costs is less dependent on whatever number appears first.
Anchoring influences judgment.
It does not remove free choice.
How do you protect yourself?
Find an independent reference.
Check typical prices.
Compare alternatives before focusing on the claimed discount.
Ask what the item is worth to you rather than how much cheaper it looks than the number printed above it.
Your brain likes having a reference.
Unfortunately, it is not always very picky about where that reference came from.
A related piece of human behavior appears in Why do we want things more when they are scarce?, where the brain handles another everyday judgment or response.
And that’s the short explanation.
Related explanations: Why do we want things more when they are scarce?, Why does an expensive option make another price seem reasonable?, and Why do prices ending in 99 cents feel cheaper?