Cognitive Scaffold

Preparing your thinking workspace

arrow_back_ios_new
MENTAL MODEL · M10733

Hourglass Model

Hourglass Model
CreateHigh supportDesign Thinking
Included
account_tree

Updated 2026-09-11

Loading revision record…

INTRODUCTION

English translation pending.

CORE DEFINITION

The hourglass model organizes written or spoken argument in three movements: an opening that establishes the broad context and why the topic matters, a middle that narrows to a single focus and develops the argument in depth, and a closing that widens again to the wider significance or methodological implication. The core proposition is that this shape combines concrete depth with a broader frame, avoiding both the paper that begins in detail nobody can place and the one that ends without saying why it mattered. The key qualification is that the shape must be visible: an opening that never narrows or a close that never widens turns the hourglass into a funnel.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Opening frame: establish the background and why the question matters before narrowing. - Middle focus: develop one specific argument in depth rather than several in parallel. - Closing elevation: return to the larger picture and state the wider implication.

anchor

Anchor fast decisions

Readers need a frame before details can be placed, and they need an implication afterward for the details to have been worth reading. Narrowing in the middle concentrates the argument's force on one claim, which is what makes the depth possible. Widening at the end returns the reader to the context from which the question came, closing the loop the opening created.

MINIMUM ACTION

In progress 0/1

Practice this model in one real situation:

Check to track your progress (stored locally)
Learning progress0%
account_treeGenealogyexpand_more
menu_bookReferencesexpand_more

Source support: Explicit

  • link
    en.wikipedia.orghttps://en.wikipedia.org/wiki/Hourglass_modelZH · Explicit
    verified

RELATED MODELS

Related model

Double Diamond Model

The Design Council’s Discover, Define, Develop and Deliver stages depict divergence and convergence around problems and solutions.

arrow_forwardRelated model

BLUF - Bottom Line Up Front

Lead with the core point, request, or conclusion in the first sentence of communication, then provide supporting details or background.

arrow_forwardRelated model

Necessity and Sufficiency

Necessity and sufficiency, abbreviated as necessary and sufficient conditions, are terms in logic used to describe the conditional or implicational relationship between two statements. In logic: When the proposition "If P then Q" is true, P is called a sufficient condition for Q, and Q is called a necessary condition for P. Therefore: When both "If P then Q" and "If Q then P" are true, P is a necessary and sufficient condition for Q, and Q is also a necessary and sufficient condition for P. When "If P then Q" is true but "If Q then P" is false, we say P is a sufficient but not necessary condition for Q, and Q is a necessary but not sufficient condition for P, and vice versa.

arrow_forward