Framing Effect

The framing effect is the demonstration that people make different choices when the same objective information is presented in different frames — gain vs. loss, lives saved vs. lives lost, 95% survival rate vs. 5% mortality rate.

Primary source: kahneman-2011-thinking-fast-and-slow, developed with amos-tversky as part of prospect-theory.

Classic Example

The “Asian Disease Problem” (Tversky & Kahneman, 1981):

• Gain frame: “Program A will save 200 lives. Program B has a 1/3 chance of saving 600 lives and 2/3 chance of saving nobody.” → Majority chose A (risk-averse).
• Loss frame: “Program C will result in 400 deaths. Program D has a 1/3 chance of no deaths and 2/3 chance of 600 deaths.” → Majority chose D (risk-seeking).

Programs A=C and B=D are objectively identical. The frame activates either the gain side or the loss side of the prospect-theory value function, changing risk preferences.

Implications

• Medical decisions are framed by how physicians present information (“90% survival” vs. “10% mortality”)
• Financial products are framed around gains or protection from losses depending on the target
• Policy communication deliberately chooses frames that activate preferred responses
• Rational agents should be frame-independent; humans are not

Related Concepts

• prospect-theory — formal theory explaining why framing works
• loss-aversion — the asymmetry in the value function that framing exploits
• cognitive-biases — framing as one of the most practically important biases