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Half-title
Title
Copyright
Contents
Preface to the fourth edition
Part I THINKING IN GENERAL
Chapter 1 What is thinking?
Types of thinking
The search-inference framework
Thinking about beliefs
How do search processes work?
Knowledge, thinking, and understanding
Naive theories
Understanding
Wertheimer and Katona
What is understanding?
Conclusion
Chapter 2 The study of thinking
Descriptive, normative, and prescriptive
Methods for empirical research
Observation
Process tracing
Interviews
Use of archival data
Hypothetical scenarios
Individual differences
Training and debiasing
Experimental economics
Physiological measurements
Computer models and artificial intelligence
General issues
Within-subject versus between
Sampling
Incentives
Development of normative models
Descriptive models and heuristics
Development of prescriptive models
Classification of biases
Conclusion
Exercise: Making a think-aloud protocol
Chapter 3 Rationality
Good thinking and goal achievement
Optimal search
The meaning of rationality
Rationality and luck
Objections to rationality
Rationality and emotion
Rationality and belief
Rational belief formation
Self-deception
Beliefs as a cause of desires
Are people ever really irrational?
Conclusion
Chapter 4 Logic
What is logic?
Types of logic
Difficulties in logical reasoning
Mental models
Logical errors in hypothesis testing
The four-card problem
The error as poor thinking
Resistance to instruction
Dual processes and rationalization
Content effects
Extensions of logic
Conclusion
Part II PROBABILITY AND BELIEF
Chapter 5 Normative theory of probability
What is probability?
The frequency theory
The logical theory
The personal theory
Constructing probability judgments
Probability as willingness to bet
Comparison with a chance setup
Well-justified probability judgments
Coherence rules and expected utility
Evaluating probability judgments
Calibration
Scoring rules
Bayes's theorem
An example from medicine
Formulas for Bayes's theorem
Why frequencies matter
When Bayes's theorem is useful and when it isn't
Coincidences
The Monty Hall problem
Use of Bayes's theorem in expert systems
Conclusion
Chapter 6 Descriptive theory of probability judgment
Accuracy of probability judgments
Frequency judgments
Calibration and inappropriate extreme confidence
Improving calibration by conditional assessment
Heuristics and biases in probability
The representativeness heuristic
Tom W.
Stereotypes and the nature of the bias
The taxicab problem
The conjunction fallacy
The gambler's fallacy and probability matching
The availability heuristic
Subadditivity
Hindsight bias
Averaging
Conclusion
Chapter 7 Hypothesis testing
Hypotheses in science
An example from medicine
Testing scientific hypotheses
The psychology of hypothesis testing
Concept formation
Congruence bias
Information bias and the value of information
Utility and alternative hypotheses
Conclusion
Chapter 8 Judgment of correlation and contingency
Correlation, cause, and contingency
Accuracy of judgment
Attentional bias
Attentional bias in judging correlation
Attentional bias in judging contingency
Effect of goals on illusion of control
Effects of prior belief
Illusory correlation
Personality traits
Prior belief and attentional bias
Understanding theory and evidence
Conclusion
Chapter 9 Actively open-minded thinking
Examples of actively open-minded thinking
Myside bias and irrational belief persistence
The order principle, the primacy effect, and total discrediting
The neutral-evidence principle
Effect of active open-mindedness on outcomes
Determinants and related phenomena
Beliefs about thinking
Distortion of beliefs by desires
Related results
Selective exposure
Belief overkill
Factors that moderate belief persistence
Elastic justification
Value conflict
Accountability
Stress
Groupthink
Conclusion
Part III DECISIONS AND PLANS
Chapter 10 Normative theory of choice under uncertainty
Expected-utility theory
Expected value
Expected utility
Other examples of comparison of errors
Why expected-utility theory is normative
The long-run argument
The argument from principles
An alternative principle: Tradeoff consistency
The utility of money
Conclusion
Chapter 11 Descriptive theory of choice under uncertainty
Experienced, predicted, and decision utility
Bias in decisions under uncertainty
The Allais paradox
Prospect theory
Probability: The pi function
Utility: The Value function and framing effects
Extending prospect theory to events without stated probabilities
Rank-dependent utility theories
Emotional effects of outcomes
Regret and rejoicing
Disappointment and elation
The role of regret in decisions
Rationality of regret and disappointment in decision making
The ambiguity effect
Ambiguity and "unknown probability"
Rationality of the ambiguity effect
Aversion to missing information
Ambiguity and adjustment of probability
Uncertainty and reasons for choice
Conclusion
Chapter 12 Choice under certainty
Prominence and noncompensatory strategies
Other reversals: Compatibility and evaluability
Response mode compatibility
Evaluability and joint versus separate evaluation
Effects of the options available on choice
Asymmetric dominance
Compromise
Mental accounting
The status quo (endowment) effect
Omission bias and default bias
Emotional effects of the reference point
Opportunity costs
Positive and negative attributes
Integration and segregation
The extra-cost effect
The sunk-cost effect
The reference price
Conclusion
Chapter 13 Utility measurement
Decision analysis and related methods
The Oregon Health Plan
Decision analysis versus cost-benefit analysis
The measurement of utility
Utility measurement as prediction
Direct versus indirect judgments
Simple direct judgment and the analog scale
Difference measurement
Standard gambles
Time tradeoff and person tradeoff
What counts in health utility?
Adaptation and point of view
Other methods involving matching and comparison
Contingent valuation (CV)
Insensitivity to quantity
Sensitivity to cost
WTA (willingness to accept) is larger than WTP
Disagreement among measures
Conclusion
Chapter 14 Decision analysis and values
Fundamental versus means values
Discovering values
Objectives of hiring a new faculty member in psychology
Conjoint measurement
MAUT as a type of decision analysis
Rules and tradeoffs
The value of human life
Teaching decision analysis
Conclusion
Chapter 15 Quantitative judgment
Multiple linear regression
The lens model
The mechanism of judgment
Do people really follow linear models?
Impression formation
Averaging, adding, and number of cues
Representativeness in numerical prediction
Anchoring and underadjustment
Simple heuristics for judgment
Elimination by aspects
Other simple heuristics
Classification
Functional measurement and conjoint analysis
Conclusion
Chapter 16 Moral judgment and choice
What are moral judgments?
Imperatives and the naturalistic fallacy
Relativism
Types of judgment
Morality versus convention
Social norms
Moral realism
Utilitarianism as a normative model
Moralistic goals
Frequently asked questions about utilitarianism
What if people want something that is wrong?
Does utilitarianism require perfect altruism?
Is it about happiness?
Does utilitarianism require calculation?
Interpersonal comparison
Utilitarianism and expected utility
Deontological rules
Rule utilitarianism
Biases in moral judgment?
Acts and omissions
Other possible biases
Protected values
Retribution
Hurting some to help others
Exploitation and inequity
Indirectness and the double effect
Agent relativity
Naturalism
Physical proximity
Can intuitions be values?
Conclusion
Chapter 17 Fairness and justice
The study of fairness and justice
Equity theory: The desire for justice
Utilitarianism and fairness
Intuitions
Heuristics and self-interest
Negotiation
Conclusion
Chapter 18 Social dilemmas: Cooperation versus defection
Laboratory versions
Prisoner's dilemma
Effects of repetition
N-person prisoner's dilemma
Normative and prescriptive theory of social dilemmas
Motives in social dilemmas
Altruism
Competition
Fairness, equality, and envy
Fear and greed
Reasons for doing what others do
Trust
Voters' illusions
Solutions to social dilemmas
Experimental approaches
Penalties
Second-order social dilemmas
The power of voting
Unfairness
Culture
Group discussion
Social reform
Conclusion
Chapter 19 Decisions about the future
The choice of personal goals
Good reasons for sticking to plans
Bad reasons for sticking to plans: Biases
Discounting
Economic theory of discounting
Normative theory of discounting
Descriptive data on discounting
The subjective discount rate
Dynamic inconsistency
Other factors
The rationality of personal discounting
Self-control
Why we need self-control
Methods of self-control
Emotions and time
Adaptation, contrast, and heuristics
Morality and prudence
Conclusion
Chapter 20 Risk
Normative theory
Public control of risk
Torts
Compensation
Private insurance
Investment and entrepreneurs
Risk regulation and the intuitions that support it
The psychometric approach
Voluntary versus involuntary
Known versus unknown
Catastrophic versus individual
Benefit
Other biases in risk judgments
Neglect of probability
Proportions versus differences
Zero risk
Individual versus statistical
Natural versus artificial
Omission versus commission
Intuitive toxicology and naive theories
Intuitions about tort law
Insurance and protective behavior
Investors and entrepreneurs
Individual and sex differences
Conclusion
References
Author Index
Subject Index
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Thinking and Deciding, Fourth Edition Beginning with its first edition and through three subsequent editions, Thinking and Deciding has established itself as the required text and important reference work for students and scholars of human cognition and rationality. In this, the fourth edition, Jonathan Baron retains the comprehensive attention to the key questions addressed in the previous editions — How should we think? What, if anything, keeps us from thinking that way? How can we improve our thinking and decision making? — and his expanded treatment of topics such as risk, utilitarianism, Bayes’s theorem, and moral thinking. With the student in mind, the fourth edition emphasizes the devel- opment of an understanding of the fundamental concepts in judgment and decision making. This book is essential reading for students and scholars in judgment and decision making and related fields, including psychology, economics, law, medicine, and business. Jonathan Baron is Professor of Psychology at the University of Pennsylvania. He is the author and editor of several other books, most recently Against Bioethics. Cur- rently he is editor of the journal Judgment and Decision Making and president of the Society for Judgment and Decision Making (2007).
Thinking and Deciding Fourth Edition Jonathan Baron University of Pennsylvania
CAMBRIDGE UNIVERSITY PRESS Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, São Paulo Cambridge University Press The Edinburgh Building, Cambridge CB2 8RU, UK Published in the United States of America by Cambridge University Press, New York www.cambridge.org Information on this title: www.cambridge.org/9780521862073 © Cambridge University Press 1988, 1994, 2000, 2008 This publication is in copyright. Subject to statutory exception and to the provision of relevant collective licensing agreements, no reproduction of any part may take place without the written permission of Cambridge University Press. First published in print format 2007 ISBN-13 978-0-511-46487-4 eBook (NetLibrary) ISBN-13 978-0-521-86207-3 hardback Cambridge University Press has no responsibility for the persistence or accuracy of urls for external or third-party internet websites referred to in this publication, and does not guarantee that any content on such websites is, or will remain, accurate or appropriate.
Contents Preface to the fourth edition I THINKING IN GENERAL . . 1 What is thinking? Types of thinking . The search-inference framework . . . . . . . Thinking about beliefs . How do search processes work? Knowledge, thinking, and understanding . . . . . . . . . . . . . . . . . . . . . . . Naive theories . Understanding . . . Conclusion . . . . . . . . . . . . . . . . . . 2 The study of thinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Descriptive, normative, and prescriptive . . . Methods for empirical research . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Observation . Computer models and artificial intelligence . . . . . . . General issues . . . . . . . . . . . . . . . . . . . . . . . . . Development of normative models . Descriptive models and heuristics . . . . . . . Development of prescriptive models . . . . . Classification of biases . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Rationality Good thinking and goal achievement . . . . . . . . . . . . . . . . . . Optimal search . The meaning of rationality . . Rationality and luck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v xiii 1 5 6 6 12 14 17 17 22 29 31 31 34 34 46 47 50 53 54 54 58 61 61 62 63 64
vi CONTENTS Objections to rationality . . . . . . . . . . . . . Rationality and emotion . . . . . Rationality and belief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rational belief formation . . . . . Self-deception . Beliefs as a cause of desires . . . . Are people ever really irrational? . . . . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Logic . . . . . . . . . . . . . . . . . . . . . . . . What is logic? . Types of logic . Difficulties in logical reasoning . . . . . Mental models . Logical errors in hypothesis testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The four-card problem . The error as poor thinking . . . . Resistance to instruction . . . . . Dual processes and rationalization . . Content effects Extensions of logic . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II PROBABILITY AND BELIEF 5 Normative theory of probability What is probability? . . . . . . . . . . . . . . . . . . . 65 67 70 70 71 73 74 74 77 77 80 82 84 88 88 89 90 91 92 93 97 99 The frequency theory . . The logical theory . . . . The personal theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Constructing probability judgments . . . . . . . . . . . . . . . . Probability as willingness to bet Comparison with a chance setup . Well-justified probability judgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coherence rules and expected utility . . . . . . . . . . . Evaluating probability judgments . . . . . . . . . . . . . Calibration . . . . Scoring rules . Bayes’s theorem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . An example from medicine . . . Formulas for Bayes’s theorem . . Why frequencies matter . . . . . . When Bayes’s theorem is useful and when it isn’t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 . . . . . . . . . . 106 . . 107 . . . . . . . . . 108 . . 109 . . . . . 112 . . . . . . . 112 . . . . . . . 113 . . . . . . . 113 . . . . . . 115 . . . . 118 . . 118 . . . . . . . . . . 119 . . . . . . . . . . 121 . . . . . 121 . . . . . . . 123 . . 126 . . . . . . . . 129 . . . . . . .
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