The art of thinking · 6 · Judgment, action and error
Curse of knowledge
Also known as: Expert blind spot, Curse of expertise
German: Fluch des Wissens
In cognitive psychology and behavioral economics, the curse of knowledge is the difficulty people have in imagining what it is like not to know something they know, so that they overestimate what others know and underestimate how hard their explanations are to follow; the term comes from Camerer, Loewenstein and Weber (1989).
- Cognitive psychology
- Judgment
In one sentence
People who know something struggle to imagine not knowing it, so they overestimate what readers know (Camerer, Loewenstein and Weber, 1989).
Example
The developer writes “Set the axis to its reference” because, for the developer, “reference” obviously means the homing position. New operators read it as “reference value” and enter a number.
What the research shows
Camerer, Loewenstein and Weber found that better-informed participants could not ignore their information when predicting the judgments of less-informed ones, even when paid to predict accurately. A frequently cited illustration is Elizabeth Newton’s study (Stanford, 1990): people who tapped the rhythm of well-known songs predicted that listeners would recognize about half of them; listeners recognized very few. The effect is closely related to hindsight bias — once an outcome is known, it seems to have been predictable.
Evidence status
The bias is robust across many tasks and age groups; it is reduced, not removed, by warnings or incentives. It is strongest when the knowledge is fluent and automatic, as in experts. The popular expert-blind-spot framing is a useful label for the same mechanism in teaching; it is not a separate finding.
How it applies
Self-review can’t reliably catch it. Testing with readers who lack the knowledge, defining terms on first use and making implicit steps explicit work better. Audience analysis and usability testing are covered in the application and documentation glossaries.
External references
- Camerer, C., Loewenstein, G., & Weber, M. (1989). The curse of knowledge in economic settings. Journal of Political Economy, 97(5), 1232–1254. https://doi.org/10.1086/261651
How to read this pool
Entries, context cards and transitional topics
The art of thinking explains ways of thinking — where a method comes from, what it asks of you and how it was adapted later. You meet four kinds of content here, each with its own job:
- Glossary entry
- Defines one concept or method of thinking: its origin, an example and how it relates to neighboring ideas. “X vs. Y” sections set two methods side by side.
- Context card of the art of thinking
- A short, self-contained answer to one question about a way of thinking — its lineage, its steps, its limits. These cards are listed on The art of thinking only.
- Transitional topicBridges both pools
- A context card that bridges both pools: it shows how a way of thinking was adapted into documentation, analysis or quality practice. It sits with the reference context cards and is marked as transitional wherever it appears.
- Reference entry or context card
- Belongs to the Glossary & Norms Space on regulation, norms and engineering. Entries here link to one only where a method is also an established tool of documentation or quality work, such as the five whys or a user’s mental model.