Human reasoning relies on a positive test strategy rather than simple confirmation bias
In short: Researchers studying the logic of scientific and everyday investigation found that what is often dismissed as a harmful confirmation bias may actually be a functional positive test strategy. Rather than simply seeking to verify existing beliefs, people tend to test cases that are expected to possess the property of interest.
This theoretical work suggests that prioritizing cases likely to have a specific trait is a useful heuristic for determining truth under realistic conditions, though it can still lead to systematic errors. The authors argue that the effectiveness of such a strategy depends heavily on the specific task being performed.
Why it matters: What we call bias might actually be a useful, though imperfect, way of searching for information.
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Sources
- Summary by Intellect · source: Research: Klayman and Ha (1987). Confirmation, disconfirmation, and information in hypothesis testing. Psychological Review.
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