Heuristics and Biases: The Psychology of Intuitive Judgment

Attribute substitution, introduced in Kahneman and Frederick's chapter 'Representativeness Revisited,' proposes that when faced with a difficult judgment, people often substitute an easier, related attribute and assess that instead. This mechanism explains why representativeness produces the conjunction fallacy, why availability drives frequency estimates, and why anchoring effects persist. The chapter positions attribute substitution as the unifying cognitive operation beneath the original three heuristics, transforming them from a list into a coherent theoretical framework. This conceptual move was significant because it responded to a persistent criticism: that the heuristics and biases program had identified phenomena without explaining the underlying process. Attribute substitution provided that process, making the program more theoretically defensible against rivals who argued it lacked a positive account of judgment.

The original anchoring-and-adjustment heuristic described insufficient adjustment from an initial value. Chapters by Epley and Gilovich, and by Chapman and Johnson, substantially revised this account. Epley and Gilovich argued that adjustment is effortful and stops when plausible values are reached, explaining why anchors produce larger effects when people are cognitively busy. Chapman and Johnson distinguished between anchor types and showed that irrelevant anchors can contaminate judgments even when people are warned about them. This refinement mattered because it transformed anchoring from a simple demonstration of bias into a more nuanced theory about when and why adjustment fails. The volume thus documents a shift from cataloguing errors to modeling the cognitive processes that generate them.

Gerd Gigerenzer and the ABC Research Group argued that the program's heuristics are defined only negatively, by their deviations from probability theory, and that apparent biases often disappear when problems are presented in frequency formats rather than probabilities . Gigerenzer also contended that the experimental tasks strip away environmental structure that makes heuristics ecologically rational. This volume includes a chapter by Gigerenzer, Czerlinski, and Martignon on 'How Good Are Fast and Frugal Heuristics?' which presents the rival framework directly rather than dismissing it. The editors' introduction frames the volume as incorporating critical responses to the program, making it a document of the debate rather than a one-sided defense. Kahneman later acknowledged that the 'heuristics and biases' label contributed to giving heuristics a bad name .

The planning fallacy describes the tendency to underestimate the time, costs, and risks of future actions while overestimating their benefits. Buehler, Griffin, and Ross's chapter 'Inside the Planning Fallacy' provides the most comprehensive treatment in the volume, distinguishing it from motivational explanations (wishful thinking) and showing that it reflects a focus on the specific case at hand rather than on distributional information from similar past cases. The chapter demonstrates that people are often aware of their past failures to meet deadlines yet still believe the current project will go smoothly. This volume advances the explanation by situating the planning fallacy within the broader program's emphasis on inside versus outside views of judgment, connecting it to the base-rate neglect literature.

Several chapters engage with what Kahneman later formalized as System 1 and System 2, though the volume predates that terminology. Gilbert's chapter on inferential correction, and Wilson, Centerbar, and Brekke's chapter on mental contamination, both examine how initial intuitive judgments are sometimes overridden by deliberate correction processes. The key insight is that correction is effortful and often incomplete, leaving residual bias even when people attempt to adjust. This volume thus documents the program's internal development toward a dual-process account without using that framework's later vocabulary. Kahneman's own afterword to the volume reflects on this evolution, noting that the interplay between intuitive and reflective thinking became increasingly central to his understanding of judgment biases .

Tversky is listed as a contributor, and the volume is dedicated to his memory. Several chapters include his work, most notably the reprinted 'Extensional versus Intuitive Reasoning: The Conjunction Fallacy in Probability Judgment,' co-authored with Kahneman, and 'Compatibility Effects in Judgment and Choice,' co-authored with Slovic and Griffin. The volume's introduction explicitly frames the project as continuing Tversky's intellectual legacy. However, the editorial work was completed by Gilovich, Griffin, and Kahneman without Tversky's direct involvement. The result is a volume that preserves Tversky's foundational contributions while extending and revising them in directions he might not have anticipated, particularly the attribute substitution framework and the engagement with ecological rationality critiques.