Anchoring as System 1 Priming

Key Insight

The second mechanism behind anchoring is an automatic priming effect driven by System 1, which often operates without any conscious adjustment. When an anchor is presented, even an absurd one, the associative machinery automatically generates compatible thoughts and selectively evokes evidence that would make the anchor seem plausible or true.

For example, being asked if Gandhi was more or less than 144 years old, the high number primes an impression of an 'ancient person,' influencing subsequent age estimates without a deliberate adjustment process. System 1 attempts to construct a coherent world where the anchor is the true or relevant number by activating compatible memories and ideas.

German psychology experiments compellingly demonstrated this priming. Participants anchored by 68°F for German temperature recognized 'summer' words more easily, while those anchored by 40°F recognized 'winter' words. Similarly, high anchors for car prices primed luxury brands, while low anchors primed mass-market brands. This selective activation of memories explains how anchors bias estimates, showcasing System 1's automatic operation of associative coherence.