Watch for anchoring

Recognize when an arbitrary first number is silently dragging your estimate.

Why it works

When estimating, System 1 latches onto any available number — even an irrelevant one — and adjusts insufficiently from it. The first figure mentioned (a price, a quota, a guess) becomes a gravitational anchor, so awareness plus a deliberate independent estimate is needed to break its pull.

How to do it

1. Before hearing any number, generate your own independent estimate and write it down.
2. When negotiating, notice the opening offer is an anchor and re-anchor deliberately.
3. Ask what the number would be if the anchor were doubled or halved — to feel its grip.

Evidence

Anchoring is among the most robust effects in judgment research, replicating across domains, including with anchors the subject knows are random. Jacowitz and Kahneman (1995) quantified the pull with a calibrated measure, showing that final estimates land systematically and predictably between a person’s own baseline and whatever high or low anchor they were first shown. (rct)

Awareness alone provides only partial protection; anchoring persists even when people are warned about it.

Sources

• Tversky & Kahneman (1974), "Judgment under Uncertainty: Heuristics and Biases", Science
• Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124–1131.
• Jacowitz, K. E., & Kahneman, D. (1995). Measures of anchoring in estimation tasks. Personality and Social Psychology Bulletin, 21(11), 1161–1166.

Common mistake

Thinking you’re immune because you know about anchoring. The effect operates below awareness — knowing the name does not switch it off.