Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M1256

PEBKAC

PEBKAC
SystemsHigh supportSystems Theory
Included
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

“Problem Exists Between Keyboard And Chair.” It refers to the fact that the root cause of technical failures is often not hardware or software, but the foolish user.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Human factors engineering perspective. Although it is sarcastic, as a scaffold, it reminds designers: since users will inevitably make mistakes (PEBKAC is the norm), the system must be designed robustly enough to tolerate and guide “foolish” operations, rather than blaming the user.

anchor

Anchor fast decisions

The real root cause of many "system failures" is user operation (between keyboard and chair), not the system itself. Instead of blaming the user, treat it as a design signal: users will inevitably make mistakes, and the system must be robust, fault-tolerant, and guiding enough to absorb "human error."

MINIMUM ACTION

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Practice this model in one real situation:

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Source support: Explicit

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