Consider the opposite before finalizing a judgment
Deliberately generate the case for the conclusion you are not reaching.
Key takeaways
- What it is: Deliberately generate the case for the conclusion you are not reaching.
- Why it works: Confirmation bias and motivated reasoning share a mechanism: the working hypothesis determines what you notice and encode. The "consider the opposite" instruction directly interrupts this by forcing the cognitive system to search for evidence in the opposite direction, partially counteracting the selective attention that produces the bias. Even a brief forced consideration reduces the effect in experimental studies.
- Evidence: Backed by observational / correlational evidence.
- Avoid: Generating the opposite case in a half-hearted way that confirms how weak it is, rather than making it as strong as possible — which reproduces the original bias in a new form.
Why it works
Confirmation bias and motivated reasoning share a mechanism: the working hypothesis determines what you notice and encode. The "consider the opposite" instruction directly interrupts this by forcing the cognitive system to search for evidence in the opposite direction, partially counteracting the selective attention that produces the bias. Even a brief forced consideration reduces the effect in experimental studies.
How to do it
- 1Before finalizing any important judgment, write the headline of the opposite conclusion.
- 2Spend two minutes generating the best evidence and arguments for that opposite view.
- 3Ask: "How strong is this case? What probability does it deserve?"
- 4Adjust your original confidence estimate to reflect this forced-considered alternative.
What the evidence says
ObservationalLord, Lepper and Preston (1984) found that instructions to "consider the opposite" significantly reduced biased assimilation of mixed evidence compared to control conditions.
Honest caveat: Effect sizes are moderate; the debiasing is partial rather than complete, and high motivation to reach a directional conclusion attenuates the benefit.
- — Lord, Lepper & Preston (1984), "Considering the opposite: A corrective strategy for social judgment," Journal of Personality and Social Psychology
Common mistake
Generating the opposite case in a half-hearted way that confirms how weak it is, rather than making it as strong as possible — which reproduces the original bias in a new form.
IX Coach automatically generates the strongest version of the opposing conclusion before you finalize a plan, making "consider the opposite" a structural feature of every coaching session rather than a step you have to remember.
Practice this with IX Coach →