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Mental Models

Overgeneralization

Overgeneralization draws a broad conclusion from limited or unrepresentative evidence. The example infers a change in all young men from the appearance of a subset.

THE IDEA

Overgeneralization

Overgeneralization draws a broad conclusion from too few or unrepresentative observations, overlooking counterexamples and differences within a group.

A story may cite the long hair and colourful clothes of young men as an example that they were being demasculinized and becoming effeminate; that one could no longer distinguish between boys and girls. The story treats the appearance of a subset as evidence about an entire gender. It also assumes that changes in fashion establish a loss of masculinity.

When to use it

  • In education, a teacher might overgeneralize from a student's poor performance in one subject to their overall intelligence.

  • In business, a manager might overgeneralize from a single failed project to the incompetence of the whole team.

  • In media reporting, a few isolated incidents of crime by a certain group can be overgeneralized to depict that group as fundamentally dangerous.

FROM THEORY TO EVERYDAY LIFE

In practice

01

Story about young men's appearance

A story may cite the long hair and colourful clothes of young men as an example that they were being demasculinized and becoming effeminate; that one could no longer distinguish between boys and girls.

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A MOMENT TO REFLECT

Put it to work.

  1. Think of a time when you made a broad generalization from a single observation. What were the consequences?

  2. How can you test whether a generalization you hold is based on sufficient evidence?

  3. Consider a stereotype you are aware of. What limited evidence might it be based on?

Connected ideas

Another lens can bring the same problem into focus.

Often confused with

CONTINUE THE CONVERSATION

Source texts

  • Lateral Thinking A Textbook of Creativity (Edward de Bono)
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