Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M2031

Hypodermic Needle Model

Hypodermic Needle Model
SystemsHigh supportSystems Theory
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

An early communication theory (now revised) that posits media can inject information directly into the audience's mind like a syringe, with the audience being completely passive and unable to resist.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Myth of propaganda: Many bosses still believe in this theory, thinking 'as long as I advertise, users will buy.' In reality, modern audiences have a strong immune system (selective exposure/understanding/retention).

anchor

Anchor fast decisions

Lasswellian metaphor: propaganda is like a subcutaneous injection, injecting information directly into a passive audience and eliciting a reaction. Later revised by the limited effects theory.

MINIMUM ACTION

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Hypodermic_needle_modelZH · Explicit
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