Anchoring, Activation, and the Construction of Values.

Anchoring is a pervasive judgment bias in which decision makers are systematically influenced by random and uninformative starting points. While anchors have been shown to affect a broad range of judgments including answers to knowledge questions, monetary evaluations, and social judgments, the underlying causes of anchoring have been explored only recently. We suggest that anchors affect judgments by increasing the availability and construction of features that the anchor and target hold in common and reducing the availability of features of the target that differ from the anchor. We test this notion of anchoring as activation in five experiments that examine the effects of several experimental manipulations on judgments of value and belief as well as on measures of cognitive processes. Our results indicate that prompting subjects to consider features of the item that are different from the anchor reduces anchoring, while increasing consideration of similar features has no effect. The anchoring-as-activation approach provides a mechanism for debiasing anchoring and also points to a common mechanism underlying anchoring and a number of other judgment phenomena. Copyright 1999 Academic Press.

[1]  Thomas Mussweiler,et al.  Hypothesis-consistent testing and semantic priming in the anchoring paradigm: A selective accessibility model. , 1999 .

[2]  Seymour Sudman,et al.  Thinking about Answers: The Application of Cognitive Process to Survey Methodology , 1996 .

[3]  B. Carlson.  Anchoring and adjustment in judgments under risk. , 1990 .

[4]  P. Slovic,et al.  Preference Reversals: A Broader Perspective , 1983 .

[5]  H. Arkes.  Costs and benefits of judgment errors: Implications for debiasing. , 1991 .

[6]  J. Klayman,et al.  Confirmation, Disconfirmation, and Informa-tion in Hypothesis Testing , 1987 .

[7]  William F. Wright,et al.  Effects of situation familiarity and financial incentives on use of the anchoring and adjustment heuristic for probability assessment , 1989 .

[8]  Craig A. Anderson,et al.  INOCULATION AND COUNTEREXPLANATION:DEBIASH"G TECHNIQUES IN THEPERSEVERANCE OF SOCIAL THEORIES , 1982 .

[9]  David Faust,et al.  Eliminating the hindsight bias. , 1988 .

[10]  Stephen J. Hoch,et al.  Availability and interference in predictive judgment. , 1984 .

[11]  B. Fischhoff,et al.  Hindsight is not equal to foresight: The effect of outcome knowledge on judgment under uncertainty. , 1975 .

[12]  D. R. Brown,et al.  Stimulus-similarity and the anchoring of subjective scales. , 1953, The American journal of psychology.

[13]  J. Baron.  Thinking and deciding, 2nd ed. , 1994 .

[14]  D. Cervone,et al.  Anchoring, Efficacy and Action: The Influence of Judgmental Heuristics on Self-Efficacy Judgments a , 1986 .

[15]  Stephen J. Hoch,et al.  An Anchoring and Adjustment Model of Spousal Predictions , 1986 .

[16]  R. Hogarth,et al.  Ambiguity and Uncertainty in Probabilistic Inference. , 1985 .

[17]  Irwin P. Levin,et al.  Information framing effects in social and personal decisions , 1988 .

[18]  Eric J. Johnson,et al.  The limits of anchoring. , 1994 .

[19]  Norbert Schwarz,et al.  Judgment in a Social Context: Biases, Shortcomings, and the Logic of Conversation , 1994 .

[20]  A. Tversky,et al.  Contingent weighting in judgment and choice , 1988 .

[21]  D. Kahneman.  Reference points, anchors, norms, and mixed feelings. , 1992 .

[22]  Paul Slovic,et al.  The relative influence of probabilities and payoffs upon perceived risk of a gamble , 1967 .

[23]  Richard A. Block,et al.  Overconfidence in estimation: Testing the anchoring-and-adjustment hypothesis , 1991 .

[24]  C. I. Hovland,et al.  Social Judgment: Assimilation and Contrast Effects in Communication and Attitude Change , 1981 .

[25]  Jerome R. Busemeyer,et al.  Linking together different measures of preference: A dynamic model of matching derived from decision field theory , 1992 .

[26]  Mark Snyder,et al.  Behavioral confirmation in social interaction: From social perception to social reality. , 1978 .

[27]  Thomas Mussweiler,et al.  Comparing Is Believing: A Selective Accessibility Model of Judgmental Anchoring , 1999 .

[28]  J. Klayman.  Varieties of Confirmation Bias , 1995 .

[29]  Eric J. Johnson,et al.  Behavioral decision research: A constructive processing perspective. , 1992 .

[30]  P. Schoemaker,et al.  Probability Versus Certainty Equivalence Methods in Utility Measurement: Are they Equivalent? , 1985 .

[31]  G. Northcraft,et al.  Experts, amateurs, and real estate: An anchoring-and-adjustment perspective on property pricing decisions , 1987 .

[32]  Timothy D. Wilson,et al.  Mental contamination and mental correction: unwanted influences on judgments and evaluations. , 1994, Psychological bulletin.

[33]  R. Koestner,et al.  Anchoring in the detection of deception and leakage. , 1984 .

[34]  P. Slovic,et al.  Reversals of preference between bids and choices in gambling decisions. , 1971 .

[35]  P. Wason.  On the Failure to Eliminate Hypotheses in a Conceptual Task , 1960 .

[36]  L. Ross,et al.  Perseverance of Social Theories: The Role of Explanation in the Persistence of Discredited Information , 1980 .

[37]  Daniel Kahneman,et al.  Referendum contingent valuation, anchoring, and willingness to pay for public goods , 1998 .

[38]  Norbert Schwarz,et al.  Constructing reality and its alternatives: an inclusion/ exclusion model of assimilation and contrast effects in social judgment , 1992 .

[39]  S. Plous,et al.  Thinking the Unthinkable : The Effects of Anchoring on Likelihood Estimates of Nuclear Warl , 1989 .

[40]  Timothy D. Wilson,et al.  A new look at anchoring effects: basic anchoring and its antecedents. , 1996, Journal of experimental psychology. General.

[41]  Brian H. Bornstein,et al.  The More You Ask For, the More You Get: Anchoring in Personal Injury Verdicts , 1996 .

[42]  R. Skov,et al.  Information-gathering processes: Diagnosticity, hypothesis-confirmatory strategies, and perceived hypothesis confirmation. , 1986 .

[43]  Eric J. Johnson,et al.  Cognitive processes in preference reversals , 1989 .

[44]  Eric J. Johnson,et al.  Bias in utility assessments: further evidence and explanations , 1989 .

[45]  R. Hogarth,et al.  Order effects in belief updating: The belief-adjustment model , 1992, Cognitive Psychology.

[46]  J. Baron.  Thinking and Deciding , 2023 .

[47]  Lyle E. Bourne,et al.  Decisions and memory: Differential retrievability of consistent and contradictory evidence , 1984 .

[48]  Eldar Shafir,et al.  Choosing versus rejecting: Why some options are both better and worse than others , 1993, Memory & cognition.

[49]  Romin W. Tafarodi,et al.  You can't not believe everything you read. , 1993, Journal of personality and social psychology.

[50]  D. Kahneman,et al.  Measures of Anchoring in Estimation Tasks , 1995 .

[51]  R. Hastie,et al.  Hindsight: Biased judgments of past events after the outcomes are known. , 1990 .

[52]  F. Strack,et al.  Explaining the Enigmatic Anchoring Effect: Mechanisms of Selective Accessibility , 1997 .

[53]  Catherine Hackett,et al.  The generality of the relation between familiarity and judged validity. , 1989 .

[54]  D. Gilbert.  How mental systems believe. , 1991 .

[55]  J Baron,et al.  Confirmation and Matching Biases in Hypothesis Testing , 1988, The Quarterly journal of experimental psychology. A, Human experimental psychology.

[56]  A. Tesser.  Self-Generated Attitude Change , 1978 .

[57]  A. Tversky,et al.  Judgment under Uncertainty: Heuristics and Biases , 1974, Science.

[58]  Janet A. Sniezek,et al.  Judgment processes in motivation: Anchoring and adjustment effects on judgment and behavior. , 1991 .

[59]  B. Fischhoff,et al.  On the Psychology of Experimental Surprises. , 1977 .

[60]  D. Medin,et al.  Decision making from a cognitive perspective , 1995 .

[61]  M. Lepper,et al.  Considering the opposite: a corrective strategy for social judgment. , 1984, Journal of personality and social psychology.

[62]  Muzafer Sherif,et al.  Attitude and Attitude Change: The Social Judgment-Involvement Approach , 1982 .

[63]  B. Fischhoff,et al.  Reasons for confidence. , 1980 .

[64]  Derek J. Koehler,et al.  Hypothesis generation and confidence in judgment , 1994 .

[65]  P. Slovic,et al.  Relative importance of probabilities and payoffs in risk taking , 1968 .

[66]  A. Tversky.  Features of Similarity , 1977 .

[67]  H. J. Einhorn,et al.  Expression theory and the preference reversal phenomena. , 1987 .

[68]  George A. Quattrone.  Overattribution and unit formation: When behavior engulfs the person. , 1982 .

[69]  Patrick S. Malone,et al.  Unbelieving the Unbelievable: Some problems in the rejection of false information , 1990 .