Amos Tversky
contemporaryCognitive Psychology / Behavioral Economics1937 – 1996
Amos Tversky (1937–1996) was an Israeli-American cognitive and mathematical psychologist whose collaborative work with Daniel Kahneman fundamentally challenged the rational-agent model in economics and decision theory. His research demonstrated systematic, predictable departures from classical rationality through heuristics and cognitive biases, reshaping both psychology and philosophy of mind. Tversky's work laid the empirical foundation for behavioral economics and contributed to a broader naturalistic turn in epistemology.
Notable Achievements
1
Co-developed prospect theory with Daniel Kahneman, replacing expected utility theory as the dominant model of decision under risk
2
Pioneered the heuristics and biases research program, identifying representativeness, availability, and anchoring as systematic sources of reasoning error
3
Documented framing effects, showing that logically equivalent choice descriptions produce reliably different decisions
4
Developed mathematical models of similarity that challenged classical set-theoretic accounts
5