Primacy Effect
Updated 2026-08-10
INTRODUCTION
English translation pending.
CORE DEFINITION
A component of the serial position effect in cognitive psychology, closely related to anchoring and confirmation bias. The core proposition is that items presented earliest are encoded more thoroughly and then serve as the frame through which later information is read. The key qualification is that the effect is strongest when judgment is made from memory and holistically, so structured scoring and delayed judgment reduce it substantially.
SCAFFOLDING EFFECT
Reduce cognitive load
- First-impression flag: notice when an initial judgment has already formed. - Evidence balance: deliberately gather later and contrary information before forming a view. - Scoring structure: replace global impressions with independent criteria scored separately.
Anchor fast decisions
Early items receive more attention and rehearsal because the list is short and processing capacity is free, so they are encoded more strongly. They also arrive before any competing frame exists, which lets them define the interpretation of everything that follows. Later items are then assimilated to that frame rather than weighed against it, which produces systematic overweighting of first information.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E5%88%BB%E6%9D%BF%E5%8D%B0%E8%B1%A1verified
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