Consider the Opposite
A technique to counteract confirmation bias by actively considering the opposite of one's initial assumptions, using methods like devil's advocate, disconfirming questions, and deliberate mistakes.
THE IDEA
Consider the Opposite
To consider the opposite, list reasons your preferred conclusion could be wrong and look for evidence that would test it. This gives you a way to question an initial judgment before seeking more support for it.
- Confirmation bias is our default setting: we hunt for information that reinforces our initial assumptions, which are often self-serving. The hubris of CEOs can be counteracted by disagreement. We need the same constructive disagreement to counteract our own confirmation bias.
- To spark that disagreement within organizations, we can institutionalize skepticism. The devil’s advocate, murder boards, and The Gong Show all license dissent. Another tool is Roger Martin’s question: “What would have to be true for this option to be the very best choice?”
- When gathering information, we can ask disconfirming questions to uncover what we’re not seeing. Law students seeking a realistic view of a firm: “Who were the last three associates to leave? What are they doing now? How can I contact them?” iPod buyers, instead of just asking about features, asked: “What problems does the iPod have?”
- Caution: Probing questions can backfire in situations with a power dynamic. Doctors, for example, are wiser to use open-ended questions: “What do you mean by ‘dizzy’?” [See footnote † for when more aggressive questioning is needed.]
- Extreme disconfirmation means forcing ourselves to actively consider the opposite of our instincts. Keeping a marriage diary helps a frustrated spouse track positive actions, countering the bias that their partner is always selfish. The practice of “assuming positive intent” encourages interpreting someone’s words or actions in a more generous light.
- We can even test assumptions by making a deliberate mistake. Paul Schoemaker’s firm won $1 million in new business by intentionally misinterpreting an RFP process to see what would happen. One woman took a chance on what seemed like a mistake and ended up marrying him.
- Compare the evidence for the competing explanations. Considering the opposite is a way to test your view; it does not require accepting the opposite conclusion.
[*] Another technique for dissenters is setting a tripwire, à la David Lee Roth. A tripwire specifies circumstances that would trigger reconsideration of a decision. If you’re skeptical but lack the power to change a decision, encourage colleagues to set a tripwire (“If X happens, we’ll take another look at this”). Colleagues may agree to a tripwire even when they consider the triggering event unlikely. If it occurs, there is an agreed path to revisit the decision without an “I told you so.”
[†] There are times when doctors need more aggressive questions. For example, if a blood test suggests a patient isn’t taking critical medication, a broad “Are you keeping up with your medication?” often fails because patients may answer “yes” out of fear or embarrassment. Probing questions like “When was the last time you took your medication?” or “Roughly how many pills do you have left?” ask for specific information about adherence.
When to use it
Reviewing a business plan or proposal for hidden risks.
Evaluating job candidates to reduce hiring bias.
Assessing investment opportunities by actively seeking contrary indicators.
Making personal life choices (e.g., moving to a new city) by listing potential downsides.
A product manager evaluating new feature ideas can ask a team member to play devil's advocate and list potential negative consequences.
A job candidate interviewing at a law firm can ask about recent departures to get a balanced view of the firm's culture.
A doctor diagnosing a patient with dizziness should start with open-ended questions (e.g., 'What do you mean by dizzy?') to avoid anchoring on their initial hypothesis.
FROM THEORY TO EVERYDAY LIFE
In practice
Investment Decision
Before investing in a stock, list three strong reasons why the company might fail. This counteracts a biased search for positive news.
Hiring Assessment
After forming a positive impression of a candidate, write down traits or facts that suggest they might not be a good fit. This helps avoid snap judgments.
iPod buyer disconfirming questions
When buying an iPod, instead of only seeking positive reviews, ask 'What problems does the iPod have?' to counteract confirmation bias.
Marriage diary for considering the opposite
A frustrated spouse who believes their partner is always selfish keeps a diary of specific actions, including actions that support or challenge that belief.
A MOMENT TO REFLECT
Put it to work.
Can you recall a recent decision where you only sought confirming evidence? How might considering the opposite have changed your outcome?
What is the strongest argument against your current belief about a project or person?
How might you design a checklist or routine to ensure you routinely consider the opposite in important decisions?
What finding would lead you to revise a recent decision? Where could you look for it?
In your workplace, how can you encourage constructive disagreement without creating conflict? What structures (e.g., devil's advocate, tripwires) could you implement?
When interviewing someone who disagrees with you, what questions can you ask to truly understand their perspective and test your own assumptions?
CONTINUE THE CONVERSATION
Source texts
- Decisive How to Make Better Choices in Life and Work (Chip Heath)
- Decisive How to Make Better Choices in Life and Work (Chip Heath)