In 2005 Wikipedia's first sentence called it “pioneer of cognitive science”. Today it says “israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-02. In 2005 Wikipedia's first sentence called it “pioneer of cognitive science”. Today it says “israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive”.
We saved snapshots of this article over twenty years; you are reading the 2005 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2005
Amos Tversky ( March 16 , 1937 - June 2 , 1996 ) was a pioneer of cognitive science , a longtime collaborator of Daniel Kahneman , and a key figure in the discovery of systematic human cognitive bias and handling of risk .1With Kahneman, he originated prospect theory to explain irrational human economic choices. He received his doctorate from the University of Michigan in 1965 , and later taught at the Hebrew University in Jerusalem , before moving to Stanford University . In 1984 he was a recipient of the MacArthur Fellowship . Amos Tversky was married to Barbara Tversky , presently a professor in the psychology department at Stanford.2He also collaborated with Thomas Gilovich , Paul Slovic and Richard Thaler in several key papers.3
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 16052333.
The opening as it stood in 2010 4 passages from the previous snapshot no longer appear
Biography portal Amos Nathan Tversky , ( ; March 16, 1937 – June 2, 1996) was a cognitive and mathematical psychologist , a pioneer of cognitive science , a longtime collaborator of Daniel Kahneman , and a key figure in the discovery of systematic human cognitive bias and handling of risk .Much of his early work concerned the foundations of measurement.He was co-author of a three-volume treatise, Foundations of Measurement (recently reprinted).His early work with Kahneman focused on the psychology of prediction and probability judgment.Amos Tversky and Daniel Kahneman worked together to develop prospect theory , which aims to explain irrational human economic choices and is considered one of the seminal works of behavioral economics .Kahneman received the Nobel Prize for the work he did in collaboration with Amos Tversky.Kahneman told The New York Times in an interview soon after receiving the honor: "I feel it is a joint prize.We were twinned for more than a decade." Tversky also collaborated with Thomas Gilovich , Paul Slovic and Richard Thaler in several key papers.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 367596632.
The opening as it stood in 2015
Amos Nathan Tversky ( ; March 16, 1937 – June 2, 1996) was a cognitive and mathematical psychologist , a student of cognitive science , a collaborator of Daniel Kahneman , and a figure in the discovery of systematic human cognitive bias and handling of risk . Much of his early work concerned the foundations of measurement. He was co-author of a three-volume treatise, Foundations of Measurement (recently reprinted). His early work with Kahneman focused on the psychology of prediction and probability judgment; later they worked together to develop prospect theory , which aims to explain irrational human economic choices and is considered one of the seminal works of behavioral economics . Six years after Tversky's death, Kahneman received the 2002 Nobel Prize in Economics for the work he did in collaboration with Amos Tversky.(The prize is not awarded posthumously.) Kahneman told The New York Times in an interview soon after receiving the honor: "I feel it is a joint prize.We were twinned for more than a decade." Tversky also collaborated with many leading researchers including Thomas Gilovich , Itamar Simonson , Paul Slovic and Richard Thaler .A Review of General Psychology survey, published in 2002, ranked Tversky as the 93rd most cited psychologist of the 20th century, tied with Edwin Boring , John Dewey , and Wilhelm Wundt .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 666932911.
The opening as it stood in 2020
Amos Nathan Tversky ( ; March 16, 1937 – June 2, 1996) was a cognitive and mathematical psychologist , a student of cognitive science , a collaborator of Daniel Kahneman , and a key figure in the discovery of systematic human cognitive bias and handling of risk . Much of his early work concerned the foundations of measurement. He was co-author of a three-volume treatise, Foundations of Measurement (recently reprinted). His early work with Kahneman focused on the psychology of prediction and probability judgment; later they worked together to develop prospect theory , which aims to explain irrational human economic choices and is considered one of the seminal works of behavioral economics . Six years after Tversky's death, Kahneman received the 2002 Nobel Prize in Economics for the work he did in collaboration with Amos Tversky. (The prize is not awarded posthumously.) Kahneman told The New York Times in an interview soon after receiving the honor: "I feel it is a joint prize. We were twinned for more than a decade." Tversky also collaborated with many leading researchers including Thomas Gilovich , Itamar Simonson , Paul Slovic and Richard Thaler . A Review of General Psychology survey, published in 2002, ranked Tversky as the 93rd most cited psychologist of the 20th century, tied with Edwin Boring , John Dewey , and Wilhelm Wundt .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 962787162.
The opening as it stood on October 6, 2023
Israeli psychologist (1937–1996) Amos Nathan Tversky ( ; March 16, 1937 – June 2, 1996) was an Israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive bias and handling of risk . Much of his early work concerned the foundations of measurement. He was co-author of a three-volume treatise, Foundations of Measurement . His early work with Daniel Kahneman focused on the psychology of prediction and probability judgment; later they worked together to develop prospect theory , which aims to explain irrational human economic choices and is considered one of the seminal works of behavioral economics . Six years after Tversky's death, Kahneman received the 2002 Nobel Memorial Prize in Economic Sciences for the work he did in collaboration with Amos Tversky. (The prize is not awarded posthumously.) Kahneman told The New York Times in an interview soon after receiving the honor: "I feel it is a joint prize. We were twinned for more than a decade." Tversky also collaborated with many leading researchers including Thomas Gilovich , Itamar Simonson , Paul Slovic and Richard Thaler . A Review of General Psychology survey, published in 2002, ranked Tversky as the 93rd most cited psychologist of the 20th century, tied with Edwin Boring , John Dewey , and Wilhelm Wundt . The New York Times . The New York Times . S2CID 145668721 . : CS1 maint: multiple names: authors list ( link )
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1171935280.
The opening as it stood in 2025 2 passages from the previous snapshot no longer appear
Israeli psychologist (1937–1996) Amos Nathan Tversky ( Hebrew : עמוס טברסקי ; March 16, 1937 – June 2, 1996) was an Israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive bias and handling of risk . Much of his early work concerned the foundations of measurement. He was co-author of a three-volume treatise, Foundations of Measurement . His early work with Daniel Kahneman focused on the psychology of prediction and probability judgment; later they worked together to develop prospect theory , which aims to explain irrational human economic choices and is considered one of the seminal works of behavioral economics . Six years after Tversky's death, Kahneman received the 2002 Nobel Memorial Prize in Economic Sciences for work he did in collaboration with Amos Tversky. While Nobel Prizes are not awarded posthumously, Kahneman has commented that he feels "it is a joint prize. We were twinned for more than a decade." Tversky also collaborated with many leading researchers including Thomas Gilovich , Itamar Simonson , Paul Slovic and Richard Thaler . A Review of General Psychology survey, published in 2002, ranked Tversky as the 93rd most cited psychologist of the 20th century, tied with Edwin Boring , John Dewey , and Wilhelm Wundt . The New York Times . The New York Times . Review of General Psychology . 6 (2): 139– 152.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1296525822. This is our newest snapshot; the live article may have moved again since.
Today
In 2005 Wikipedia's first sentence called it “pioneer of cognitive science”. Today it says “israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive”. Read the current article and compare.
2005
2010
2015
2020
Oct '23
2025
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What Wikipedia says this is
Every article opens by defining its subject. This one was redefined between 2005 and 2025.
Then
pioneer of cognitive science
Now
israeli cognitive and mathematical psychologist and a key figure in the discovery of systematic human cognitive
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.