Framing Effect — The Same Fact, Its Wording Changes the Decision
'Surgery with a 90% survival rate' vs. 'surgery with a 10% mortality rate.' They're exactly the same fact, yet doesn't the first feel much safer? That's the framing effect.
What Is the Framing Effect
The Framing Effect is the phenomenon where, even for logically identical information, people's judgments and choices differ depending on how it is 'framed.'
Tversky and Kahneman systematically revealed it in their 1981 paper 'The Framing of Decisions and the Psychology of Choice' in Science. They showed experimentally that the 'reference point' of the earlier prospect theory shifts back and forth depending on wording.
The Classic Experiment: The Asian Disease Problem
This is an experiment where people chose between two measures for an epidemic that could kill 600 people.
When the outcome was presented as 'lives that can be saved (gain frame),' about 72% chose the safe option of 'saving 200 people for certain.' But when the exact same outcome was reframed as 'the number who die (loss frame),' about 78% chose the gamble (the risky option) to avoid '400 dying for certain.'
In other words, when it looks like a gain, people avoid risk; when it looks like a loss, people take on risk. The numbers are identical; only the frame changed.
This experiment is known to be robust enough to be repeatedly reproduced across later studies even when the wording is refined. However, the size of framing can vary depending on context and urgency.
What to Watch Out for in Investing
Financial ads and news are full of frames. 'A +40% return over the past 3 years' sounds attractive, but reframing the same stretch as 'a -30% drop at one point from the peak' completely changes the impression. Both can be true.
'A 1% annual fee' looks small, but reframed as 'a cost that eats a substantial portion of your principal and interest over 20 years,' it lands differently. The defense is simple. Before being persuaded by one frame, flip the same numbers over into the opposite frame. That is why it's important to build the habit of seeing returns, drawdowns, and costs together on one screen.
よくある質問
Q. How are the framing effect and loss aversion connected?
The reason the loss frame is so powerful is loss aversion. Even for the same outcome, when it is worded as 'losing,' the pain of loss feels large, so to avoid that loss you take on more risk than usual. The framing effect can be seen as the way loss aversion operates depending on wording.
Q. Can I use framing to my own advantage?
For your own sake, yes. For example, framing saving not as 'money you can't spend' but as 'a gift to your future self' makes it easier to act on. However, you should be wary of framing that misleads others, and it's safer to always cross-check investment judgments through multiple frames.
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