[ View menu ]

March 9, 2005

Honesty, No longer the best policy?

Filed in Research News
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

THE DIRT ON COMING CLEAN: PERVERSE EFFECTS OF DISCLOSING CONFLICTS OF INTEREST

Advice-daylight-smaller.gif

Conflicts of interest have been at the heart of many business scandals. Investment bankers who get paid more when their clients trade more, or doctors who get paid more when their patients require more care, are both examples of advisors with a conflict of interest. The solution usually is considered to be a full disclosure of each party’s conflict of interest. A recent article out of Carnegie Mellon University by Daylian Cain, Don Moore, George Loewenstein investigates to what extent the receivers of advice use this knowledge to counteract any given biases and how disclosure of conflicts affects the advice given. The authors argue such disclosure may not remedy conflicts but could possibly aggravate them.

ABSTRACT

“Conflicts of interest can lead experts to give biased advice. While disclosure has been proposed as a potential solution to this, we show that disclosure can have perverse effects, and might even increase bias. Disclosure may increase bias because advisors feel morally licensed and strategically encouraged to exaggerate their advice even further from the truth. As for those receiving the advice, proper use of the disclosure depends on understanding how the conflict of interest biased the advice and how that advice impacted them. Because people lack this understanding, disclosure can fail to solve the problems created by conflicts of interest.”

QUOTES

“Perhaps, however, the benefits of disclosure should not be accepted quite so quickly. For disclosure to be effective, the recipient of advice must understand how the conflict of interest has influenced the advisor and must be able to correct for that biasing influence. In many important situations, however, this understanding and ability may be woefully lacking. For example, imagine a patient whose physician advises, “Your life is in danger unless you take medication X,” but who also discloses, “The medication’s manufacturer sponsors my research.” Should the patient take the medication? If not, what other medication? How much should the patient be willing to pay to obtain a second opinion? How should the two opinions be weighed against each other? The typical patient may be hard-pressed to answer such questions.”

“And what is the impact of disclosure on providers of advice? In the example just given, is it possible that the physician’s behavior might be affected by disclosure? For example, might the physician be more likely to exaggerate the danger of not taking the medication in order to neutralize the anticipated “warning” effect of the disclosure?”

“First, estimating the impact of a conflict of interest on an advice giver is an extraordinarily difficult problem that requires both economic and psychological insight. To properly estimate the degree to which a particular advisor is biased by a conflict of interest, one would want to know the extent to which the advisor embraces professional norms or is instead corrupt. One would also want to know how tempting the advisor finds the incentives for providing biased advice, and one would want to have an accurate mental model of how such incentives can bias advice. However, prior research suggests that most people have an incorrect understanding of the psychological mechanisms that transform conflicts of interest into biased advice.”

“Research on what has been called the “failure of evidentiary discreditation” shows that when the evidence on which beliefs were revised is totally discredited, those beliefs do not revert to their original states but show a persistent effect of the discredited evidence (Skurnik, Moskowitz, and Johnson 2002; Ross, Lepper, and Hubbard 1975). Furthermore, attempts to willfully suppress undesired thoughts can lead to ironic rebound effects, in some cases even increasing the spontaneous use of undesired knowledge (Wegner 1994).”

“Disclosure, at least in the context of the admittedly stylized experiment discussed in this paper, benefited the providers of information but not its recipients. To the extent that a similar effect occurs outside the experimental laboratory, disclosure would supplement existing benefits already skewed toward information providers. In particular, disclosure can reduce legal liability and can often forestall more substantial institutional change. We do not believe that this is a general result—that is, that disclosure always benefits providers and hurts recipients of advice—but it should challenge the belief that disclosure is a reliable and effective remedy for the problems caused by conflicts of interest.”

EXPERIMENTAL METHOD

“The estimation task involved estimating the values of jars of coins. Estimators were paid according to the accuracy of their estimates, and advisors were paid, depending on the experimental condition, on the basis of either how accurate or how high (relative to actual values) the estimators’ estimates were.

In each round, advisors took turns at closely examining a jar of coins and then completed an advisor’s report. Each advisor’s report contained the advisor’s suggestion of the value of the jar in question and provided a space in which the estimator would respond with an estimate of the jar’s worth.

After seeing the reports, the estimators saw the jar in question — but only from a distance of about 3 feet and only for about 10 seconds: the experimenter held the jar in front of estimators, turning the jar while walking along a line across the room and back. Estimators then attempted to estimate the value of the coins in the jar.

The amount of money in each of the six jars (M, N, P, R, S, and T) was determined somewhat arbitrarily to lie between $ 10 and $ 30, and advisors were informed of this range. Estimators were told that advisors had information about the range of actual values but were not given this range of values themselves. In fact, the values of the jars were M = $ 10.01, N = $ 19.83, P = $ 15.58, R = $ 27.06, S = $ 24.00, and T = $ 12.50. In the first three rounds, neither estimators nor advisors received feedback about their actual payoffs or about actual jar values. In each of the last three rounds, however, after advisors had given their advice and estimators had made their estimates, each advisor was shown the estimate of the estimator to whom their advice was given on the previous jar and, for each of the feedback rounds, the actual value of the jar in question was announced to everyone at the end of the round. Since payoff schedules were provided to all participants at the beginning of the experiment, feedback allowed both advisors and estimators to calculate how much money they had made in the previous round before continuing on to the next round. While estimators did not see the advisor’s instructions, advisors saw a copy of the estimator’s instructions and thus could also use feedback to calculate their estimator’s payoffs.

Both estimators and advisors were paid on the basis of the estimator’s estimates. Estimators were always paid on the basis of the accuracy of their own estimates. Advisors’ remuneration depended on the condition to which they were assigned. In the “accurate” condition, each estimator was paid according to how accurate the estimator’s estimate was, and this was disclosed prominently on the advisor’s report immediately under the advisor’s suggestion. (“Note: The advisor is paid based on how accurate the estimator is in estimating the worth of the jar of coins.”) In the “high/undisclosed” and “high/disclosed” conditions, each advisor was paid on the basis of how high the estimator’s estimate was. This conflict of interest was not disclosed in the high/undisclosed condition but was prominently disclosed in the high/disclosed condition, immediately under the advisor’s suggestion. (“Note: The advisor is paid based on how high the estimator is in estimating the worth of the jar of coins.”) In addition to being remunerated on the basis of their estimators’ estimates, all advisors had an additional opportunity to earn money: after they had completed the report for each jar, advisors were asked to give their own personal best estimates of the true value of the coins in the jar and were rewarded on the basis of accuracy.”

Figure-one.gif

Advice provided for each jar, by condition

ABOUT THE AUTHORS

Daylian Cain

Dmc.jpg

“I am a 4th year doctoral student at Carnegie Mellon University’s Tepper School of Business, (Pittsburgh, PA) where I concentrate on Organizational Behavior & Theory. My main area of interest is decision making — both the normative aspects (as informed by Ethics and Economics) and the descriptive aspects (as informed by Social Psychology and Behavioral Decision Research). I also earned an academic background in Philosophy, where I was interested in theories of rationality and morality. These combined interests lead me to conduct research and lecture on topics such as managerial decision making, business ethics, and negotiations. ”

Daylian Cain Home Page

Don Moore

Don Moore cropped.jpg

Don Moore is an Assistant Professor in the Organzational Behavior and Theory group at the Tepper School of Business at Carnegie Mellon University. “The human mind, for all its miraculous power, does not come with an instruction manual. This ignorance has tremendous consequences, not only for the way we make decisions as individuals, but also for interactions (including negotiations), and for the organizations we create. My work seeks to fill important gaps in our understanding of ourselves and document the implications of these discoveries on social, organizational, and market outcomes.”

Don Moore’s Home Page

George Loewenstein

George Loewenstein.jpg

George Loewenstein is a professor in the Department of Social and Decision Sciences at Carnegie Mellon University. “My primary research focus is on intertemporal choice–decisions involving trade-offs between costs and benefits occurring at different points in time. Because most decisions have consequences that are distributed over time, the applications of intertemporal choice are numerous (e.g. saving behavior, consumer choice, labor supply).

In the past, formal analyses of intertemporal choice in economics and other social science disciplines have been dominated by a single model–the discounted utility model. I try to identify deficiencies with this model, explain these deficiencies in psychological terms and propose alternative models.”

George Loewenstein Home Page

March 1, 2005

Duncan Luce

Filed in Profiles
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

DECISION SCIENCE RESEARCHER PROFILE: DUNCAN LUCE AWARDED 2003 NATIONAL MEDAL OF SCIENCE

Duncan Luce 02.jpg

R. Duncan Luce is a Distinguished Research Professor of Cognitive Science and Economics at UC Irvine. At the age of 79 Luce, in recognition of his work in the behavioral and social sciences, has been named one of eight U.S. scientists and engineers to receive the 2003 National Medal of Science; the highest scientific honor in the United States. On March 14, 2005 President George W. Bush will present them with the honor at the Whitehouse. Why it is awarded two years after 2003 is a mystery to us.

The National Medal of Science honors individuals both for pioneering and innovating scientific research that has led to a better understanding of the world, and for contributing to innovations and technologies that give the United States a global economic edge. The award was established in 1959 and is administered by the National Science Foundation.

Luce received his PhD in mathematics from the Massachusetts Institute of Technology in 1950. He feels there is an inherent link between math and psychology. “Given the fact that people manage to live together in a fairly reasonable way most of the time, there have to be behavioral regularities,” he says. “Mathematical behavioral science attempts to formulate such regularities.”

Professor Luce’s contributions to mathematical psychology have had a great influence on how the field examines decision making and sensory psychology. Luce combines mathematical theory and experiments, in efforts to understand features of individual behavior and orientation to the world. His method includes the development of formal mathematical models that consequently contribute to the shaping of contemporary economics.

As a child, Duncan Luce liked painting pictures and was fascinated with airplanes. His parents swayed him against an artistic career and an astigmatism kept him from becoming a military pilot. But Luce has been flying high for years and continues to create new ideas in his field.- from Luce’s homepage at UC Irvine.

Luce served as advisor to many successful graduate students, including Columbia University Center for the Decision Sciences Director, and past President of the Society for Judgment and Decision Making Elke Weber.

RESEARCH INTERESTS:

“The representational theory of measurement concerns the types of data that can be summarized in some numerical way. Much general theory has been developed (Foundations of Measurement, vols. 1,2,3, 1971, 1989, 1990, with D.M. Krantz, P Suppes, & A. Tversky) and still is being actively explored. Although some of my efforts lie in this general area, over the last seven years I have mostly been applying some of these ideas to individual decision making, where the numerical measures are called utility and subjective probability or weights. Recently I have been examining the kinds of behavioral laws that link riskless utility and risky utility. Accompanying the theoretical work is an empirical program in which these plausible behavioral properties are tested in computer-based, laboratory experiments. There are many tricky and interesting questions of how best to evaluate these properties. The results to date exhibit highly regular patterns that are nicely summarized by numerical models.” -from Professor Luce’s Homepage

RECENT BOOKS

(2000) Utility of Gains and Losses: Measurement-Theoretical and Experimental Approaches. Mahwah, NJ: Lawrence Erlbaum Association.

(1997) Choice, Decision, and Measurement: Essays in Honor of R. Duncan Luce

(1993) Sound & Hearing: A Conceptual Introduction. Hillsdale, NJ: Erlbaum.

(1991) Response Times: Their Role in Inferring Elementary Mental Organization: Oxford.

(1990) With D.H. Krantz, P. Suppes & A. Tversky. Foundations of Measurement, Vol. III, Academic Press.

February 28, 2005

ACR 2005 Call For Papers

Filed in Conferences
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

2005 NORTH AMERICAN CONFERENCE OF THE ASSOCIATION FOR CONSUMER RESEARCH CALL FOR PAPERS

The 2005 North American Conference of the Association for Consumer Research will be held at the Crowne Plaza Hotel located on the Riverwalk in San Antonio, Texas, from Thursday September 29 through Sunday October 2, 2005.

sanan_pm.jpg

Submission and Decision Deadlines
Submissions for competitive papers, working papers, roundtables, and special topic session proposals must be received no later than Friday, March 18, 2005. Notification of acceptance in these four categories will be made by Friday July 15, 2005. The entry deadline for film festival submissions is July 1, 2005. Notification of accepted films will be August 1, 2005.

To give as many people as possible the opportunity to participate in ACR 2005, note the requirement that each ACR participant may present in Special Topic and/or Competitive Paper sessions no more than twice during the duration of the conference.

General Submission Requirements and Procedures
Except for film festival submissions, all submissions, reviewing, and notification regarding ACR 2005 will be conducted electronically through the web site. The ACR web site (http://www.acrwebsite.org/) will contain a link to the 2005 conference site, which will be updated to accept all the required information through an interface that eliminates the need for e-mail submissions. The 2005 ACR conference web site will be available for submissions between Monday, February 7 and midnight PST of the deadline, Friday, March 18, 2005.

More detail below. This info culled from http://www.acrwebsite.org/conference/info.asp
Continue reading ACR 2005 Call For Papers

February 13, 2005

Computer-savvy postdoc wanted @ Columbia

Filed in Jobs
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

POSTDOCTORAL FELLOWSHIP – COLUMBIA UNIVERSITY CENTER FOR THE DECISION SCIENCES

ADDENDUM: This post has been filled, 4/2005.

Columbia University’s Center for the Decision Sciences anticipates hiring a computer-savvy postdoctoral Associate Director for a period of one to two years, with a starting date of August 2005. The Associate Director will carry out research, coordinate a year-long speaker series, administer the Center and run the CDS Online Virtual Laboratory server.

The Center for the Decision Sciences at Columbia University is directed by Professors Eric Johnson, David Krantz, and Elke Weber and includes researchers from psychology, marketing, management, medicine, law and beyond. Please visit the website for more information: http://cebiz.org/cds

This position is open to candidates with excellent computer skills and training in cognitive psychology or related disciplines who have recently earned their Ph.D., or who are expecting their degree in 2005 on a topic relevant to the psychology of decision making.

The candidate should be comfortable running a Linux Web server as well as coding HTML and dynamic scripting languages such as PHP and JavaScript. Experience with SQL, databases, SAS and lightweight UNIX systems administration and security is very much recommended but not essential.

One of the current Center foci is a large Preferences as Memory project, which looks at the role of psychological memory processes on the formation of preferences, inferences, and choice. Experience and interest in the psychology of memory would be a large asset.

To apply, please send a CV, two letters of recommendation, up to 3 reprints, and a cover letter describing research interests. In your letter, please describe computer skills, (memory) research expertise, and experience carrying out experimental research.

Review of applications will continue until the position is filled.

Applications should be sent to

Daniel Goldstein, Ph.D. Associate Director
Columbia University, Center for the Decision Sciences
420 W. 118th #805A MC3355, New York, NY 10027

Columbia University is an Affirmative Action, Equal Opportunity Employer.

January 23, 2005

Egon Brunswik

Filed in Profiles
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

DECISION SCIENCE RESEARCHER PROFILE: EGON BRUNSWIK

Egon Brunswik (1903-1955), a pioneer of cognitive psychology, devoted much of his work to the extension and elaboration of the fundamental point that psychology should focus as much on the properties of the organism’s environment as it does to the organism itself. The environment that an organism comes into contact with is uncertain and probabilistic. Adaptation to a probabilistic world requires an organism to adopt a probability-based strategy for survival. The organism must learn to rely upon uncertain information about the world. His “probabilistic functionalism” was the first behavior system to be founded on Probabilism, which today increasingly attracts the attention of learning, thinking, decision process, perception, and communication theorists.

In 1921 he graduated from the Theresianische Akademie after receiving training in mathematics, science, classics, and history. He then studied engineering and passed the state examinations but afterward enrolled as a student of psychology at the University of Vienna. Here he became an assistant in Karl Buehler’s Psychological Institute (among his student colleagues were Paul F. Lazarsfeld and Konrad Lorenz) and received a PH.D. in 1927. While a graduate student in psychology, he also passed the state examination for Gymnasium teachers in mathematics and physics.

His historical as well as theoretical analysis also led him to criticize orthodox methods of experimental design (particularly the “rule of one variable”) and to suggest methods for avoiding what he believed to be an unfortunate artificiality inherent in classical experimental procedures. His main field of empirical research was perception, but he also brought his probabilistic approach to bear on problems of interpersonal perception, thinking, learning, and clinical psychology.

Brunswik’s life did not come to a happy end. He committed suicide in 1955.

-from The Brunswik Society homepage

Egon Brunswik redefined the fundamental task of psychology (focus on distal / distal relations) based on thorough study of the history of psychology as a science, came up with a basic theoretical framework (the lens model and probabilistic functionalism) and original methodology of psychological research (representative design of experiments). His papers on perception introducing the concept of ecological validity of perceptual cues) predated the coming of “ecological psychology”. Built on his ideas the social judgment theory and cognitive continuum theory of Kenneth R. Hammond University of Colorado) and a others inspired a broad scope of research on perception, cognitive conflict resolution, decision making, policy formation and analysis which blooms on international scale today. Thousands of empirical studies, techniques using computer assisted counseling were developed since the beginning

-from the University of Chicago Press.

QUOTE:

“Perception, then, emerges as that relatively primitive, partly autonomous, institutionalized, ratiomorphic subsystem of cognition which achieves prompt and richly detailed orientation habitually concerning the vitally relevant, mostly distal aspects of the environment on the basis of mutually vicarious, relatively restricted and stereotyped, insufficient evidence in uncertainty-geared interaction and compromise, seemingly following the highest probability for smallness of error at the expense of the highest frequency of precision.That’s a simplification. Perception is standing on the sidewalk, watching all the girls go by.”

–Frank Rosenblatt, quoting Egon Brunswik’s “Perception and the Representative Design of Psychological Experiments,” and The New Yorker, December 19, 1959, in “Principles of Neurodynamics: Perceptrons and the Theory of Brain Mechanisms”, 1962.

WORKS BY BRUNSWIK:

*1934 Wahrnehmung und Gegenstandswelt: Grundlegung einer Psychologie vom Gegenstand her. Leipzig: Deuticke.
*1937 Psychology as a Science of Objective Relations. Philosophy of Science 4:227-260.
*1943 Organismic Achievement and Environmental Probability. Psychological Review 50:255-272.
*(1947) 1956 Perception and the Representative Design of Psychological Experiments. 2d ed., rev. & enl. Berkeley: Univ. of Calif. Press.
*1952 The Conceptual Framework of Psychology. Univ. of Chicago Press.
*1955 Representative Design and Probabilistic Theory in a Functional Psychology. Psychological Review 62:193-217.

January 13, 2005

Are the two birds in the bush a better choice than the one in your hand?

Filed in Research News
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

SEPERATE NEURAL SYSTEMS VALUE IMMEDIATE AND DELAYED MONETARY REWARDS

Bird-shadow-04.gif

People seem to alternate between choosing to indulge in what is immediately available and choosing to decide based upon the knowledge that patience often wins in the long run. If you offer someone $10 today and $11 tomorrow, it’s likely they will choose the $10 today. But if you offer someone $10 in a year and $11 in a year and one day, they’ll probably choose the $11. The relative values of options may be discounted according to how long one expects to wait until payoff. To date little research has investigated the source of the tension between short-term and long-term preferences. A recent study in Science by Samuel McClure, David Laibson, George Loewenstein and Jonathan Cohen suggests that this discrepancy is due to the fact that two separate neural systems value immediate and delayed monetary rewards.

ABSTRACT:
“When humans are offered the choice between rewards available at different points in time, the relative values of the options are discounted according to their expected delays until delivery. Using functional magnetic resonance imaging, we examined the neural correlates of time discounting while subjects made a series of choices between monetary reward options that varied by delay to delivery. We demonstrate that two separate systems are involved in such decisions. Parts of the limbic system associated with the midbrain dopamine system, including paralimbic cortex, are preferentially activated by decisions involving immediately available rewards. In contrast, regions of the lateral prefrontal cortex and posterior parietal cortex are engaged uniformly by intertemporal choices irrespective of delay. Furthermore, the relative engagement of the two systems is directly associated with subjects’ choices, with greater relative fronto-parietal activity when subjects choose longer-term options.”

QUOTES:
“In Aesop’s classic fable, the ant and the grasshopper are used to illustrate two familiar, but disparate, approaches to human intertemporal decision making. The grasshopper luxuriates during a warm summer day, inattentive to the future. The ant, in contrast, stores food for the upcoming winter. Human decision makers seem to be torn between an impulse to act like the indulgent grasshopper and an awareness that the patient ant often gets ahead in the long run. This research is unified by the idea that consumers behave impatiently today but prefer/plan to act patiently in the future.”

“Impulsive preference reversals are believed to be indicative of disproportionate valuation of rewards available in the immediate future. Some authors have argued that such dynamic inconsistency in preference is driven by a single decision-making system that generates the temporal inconsistency, while other authors have argued that the inconsistency is driven by an interaction between two different decision-making systems. Specifically, we hypothesize that short-run impatience is driven by the limbic system, which responds preferentially to immediate rewards and is less sensitive to the value of future rewards, whereas long-run patience is mediated by the lateral prefrontal cortex and associated structures, which are able to evaluate trade-offs between abstract rewards, including rewards in the more distant future.”

Fig-1-temporal-unequal-rewa.gif

Brain regions that are preferentially activated for choices in which money is available immediately (Beta areas). (A) A random effects general linear model analysis revealed five regions that are significantly more activated by choices with immediate rewards, implying d 0 0 (at P G 0.001, uncorrected; five contiguous voxels). These regions include the ventral striatum (VStr), medial orbitofrontal cortex (MOFC), medial prefrontal cortex (MPFC), posterior cingulate cortex (PCC), and left posterior hippocampus (table S1). (B) Mean event-related time courses of Beta areas (dashed line indicates the time of choice; error bars are SEM; n 0 14 subjects). BOLD signal changes in the VStr, MOFC, MPFC, and PCC are all significantly greater when choices involve money available today (d 0 0, red traces) versus when the earliest choice can be obtained only after a 2week or 1-month delay (d 0 2 weeks and d 0 1 month, green and blue traces, respectively).

Fig-2-temporal-unequality-.gif

Brain regions that are active while making choices independent of the delay (d) until the first available reward (delta areas). (A) A random effects general linear model analysis revealed eight regions that are uniformly activated by all decision epochs (at P Fig-3-Temporal-unequal-rewa.gif

Differences in brain activity while making easy versus difficult decisions separate delta areas associated with decision making from those associated with non-decision-related aspects of task performance. (A) Difficult decisions were defined as those for which the difference in dollar amounts was between 5% and 25%. (B) Response times (RT) were significantly longer for difficult choices than for easy choices (P fig-4-temporal-unequal-rewa.gif

Greater activity in delta than beta areas is associated with the choice of later larger rewards. To assess overall activity among beta and delta areas and to make appropriate comparisons, we first normalized the percent signal change (using a z-score correction) within each area and each subject, so that the contribution of each brain area was determined relative to its own range of signal variation. Normalized signal change scores were then averaged across areas and subjects separately for the beta and delta areas (as identified in Figs. 1 and 2). The average change scores are plotted for each system and each choice outcome. Relative activity in beta and delta brain regions correlates with subjects’ choices for decisions involving money available today. There was a significant interaction between area and choice (P Homepage.

David Laibson

Professor is a professor of Economics at Harvard University. He received his PhD in economics from the Massachusetts Institute of Technology in 1994. His Primary fields of interest are Macroeconomics (particularly consumption and savings), intertemporal choice, psychology and experimental economics.

David Laibson Homepage

George Loewenstein

George Loewenstein has been a professor at Carnegie Mellon University since 1990.
He received his PhD with distinction in economics from Yale University in 1985. “My primary research focus is on intertemporal choice–decisions involving trade-offs between costs and benefits occurring at different points in time. Because most decisions have consequences that are distributed over time, the applications of intertemporal choice are numerous (e.g. saving behavior, consumer choice, labor supply).” From George Loewenstein Homepage

Jonathan D. Cohen

Jonathan Cohen has joint appointments in Psychiatry in the Western Psychiatric Institute and Clinic at the University of Pittsburgh and Psychology at Carnegie Mellon University. He received his PhD in cognitive psychology from Carnegie Mellon University in 1990. “Research in my laboratory focuses on the neurobiological mechanisms underlying cognitive control, and their disturbance in psychiatric disorders such as schizophrenia and depression. Cognitive control is the ability to guide attention, thought and action in accord with goals or intentions. One of the fundamental mysteries of neuroscience is how this capacity for coordinated, purposeful behavior arises from the distributed activity of many billions of neurons in the brain.” From the Jonathan Cohen Homepage

December 20, 2004

Society for Consumer Psychology 2005 Winter Conference

Filed in Conferences
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

SCP 2005 WINTER CONFERENCE

scp-logo.gif

The Upcoming Society for Consumer Psychology SCP winter conference will be held from Thursday February 24th to Monday the 28th 2005 at the TradeWinds Island Grand Resort in St. Pete Beach, Florida.

“The Society for Consumer Psychology represents the interests of behavioral scientists in the fields of psychology, marketing, advertising, communication, consumer behavior, and other related areas. Some members of the Society are mainly interested in generating applied knowledge to solve specific marketing related problems, while others focus on generating basic knowledge to contribute to theoretical and conceptual foundations of consumer psychology. The Society encourages all members to share their knowledge and contribute to the discipline of consumer psychology as a whole through contributions in conferences, journal articles, and book chapters”. -From the Society for Consumer Psychology Home Page

To register for the winter conference go to the SCP home page and click on “Winter 2005 SCP Conference Online Registration” or click here to link directly. A preliminary program for the SCP winter conference is availbale here or at the SCP home page.

Conference Chairs:

Anne Brumbaugh, Wake Forest University Home Page
Geraldine R. Henderson, Univerity of Texas at Austin Home Page

Conference Co Chairs:

Amar Cheema, Washington University in St. Louis Home Page
Scott A. Hawkins, University of Toronto Home Page
Joydeep Srivastava, University of Maryland Home Page

December 13, 2004

How can somebody make a decision without all the facts? Well, there’s actually no other way.

Filed in Books
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

BOUNDED RATIONALITY: THE ADAPTIVE TOOLBOX by Gerd Gigerenzer and Rienhard Selten.

Bounded-Rationality.gif

How do real people make decisions in an uncertain world? In the book Bounded rationality: The adaptive tool box, Gigerenzer and Selten (et al.) investigate the constraints of limited information and time upon human logic and reasoning in the decision making process. The authors view Bounded Rationality neither as the optimization of limited resources under constraint nor as a study of the failings of human reasoning capability.

QUOTES:
“Visions of rationality do not respect disciplinary boundaries. Economics, psychology, animal biology, artificial intelligence, anthropology, and philosophy struggle with models of sound judgment, inference and decision making. These models evolve over time, just as the idea of rationality has a history, a present and a future (Daston 1988). Over the last centuries, models of rationality have changed when they conflicted with actual behavior, yet, at the same time, they provided prescriptions for behavior. This double role-to describe and prescribe- does not map easily onto a sharp divide between descriptive and normative models, which plays down the actual exchange between the psychological and the rational (Gigerenzer et al. 1989). Herbert Simon’s notion of bounded rationality was proposed in the mid-1950’s to connect, rather than to oppose, the rational and the psychological (Simon 1956). The aim of this book is to contribute to the process of coevolution, by inserting more psychology into rationality, and vice versa.”

“In a complex and uncertain world humans and animals make decisions under the constraints of limited knowledge, resources, and time. Yet models of rational decision making in economics, cognitive science, biology and other fields largely ignore these real constraints and instead assume agents with perfect information and unlimited time. About forty years ago Herbert Simon challenged this view with his notion of “bounded rationality”. Today, bounded rationality has become a fashionable term used for disparate views of reasoning.”

ABOUT THE AUTHORS:

Gerd Gigerenzer

Gigerenzer.gif

Gerd Gigerenzer is Director of the Center for Adaptive Behavior and Cognition at the Max Planck Institute for Human Development in Berlin and former Professor of Psychology at the University of Chicago. He won the AAAS Prize for the best article in the behavioral sciences.

Reinhard Selten

selten.gif

Reinhard Selten received his PhD in mathematics at the University of Frankfurt am Main. Reinhard Selten is Fellow of the Econometric Society, President of the European Economic Association, a Honorary Member of the American Economic Association, a Member of the Nordrhein-Westfälische Akademie der Wissenschaften, and a Foreign Honorary Member of the American Academy of Arts and Sciences. He is also a Honora Patrona Komitato at Universala Esperanto Asocio. His main areas of interest are Game Theory and its applications as well as Experimental Economics and the Theory of Bounded Rationality. In 1994 he won the Nobel Memorial Prize in Economics, together with John C. Harsanyi and John F. Nash.

December 1, 2004

Is reading about the kettle the same as touching it?

Filed in Research News
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

DECISIONS FROM EXPERIENCE AND THE EFECTS OF RARE EVENTS IN RISKY CHOICE

Kettle-03.gif

Studies of risky choice almost always examaine decisions made from descriptive sources of information, for example pie charts and frequency distributions. Nonetheless, people in the real world usually make decisions without descriptions and rely on personal experience. The studies described here indicate a discrepancy in choice behavior concerning specific rare events. Why do decisions made from descriptions seem to overweight rare events and decisions made from experience seem to underweight them? A recent study by Ralph Hertwig, Greg Barron, Elke Weber and Ido Erev investigates how the manner of information acquisition, whether from a descriptive source or from personal experience, can dramatically influence choice behavior.

Abstract:
When people have access to information sources such as newspaper weather forecasts, drug-package inserts, and mutual-fund brochures, all of which provide convenient descriptions of risky prospects, they can make decisions from description. When people must decide whether to back up their computer’s hard drive, cross a busy street, or go out on a date, however, they typically do not have any summary description of the possible outcomes or their likelihoods. For such decisions, people can call only on their own encounters with such prospects, making decisions from experience. Decisions from experience and decisions from description can lead to dramatically different choice behavior. In the case of decisions from description, people make choices as if they overweight the probability of rare events, as described by prospect theory. We found that in the case of decisions from experience, in contrast, people make choices as if they underweight the probability of rare events, and we explored the impact of two possible causes of this underweighting-reliance on relatively small samples of information and overweighting of recently sampled information. We conclude with a call for two different theories of risky choice.

Quotes:
“Studies of human risky choice almost exclusively examine decisions from description. In a recent meta-analysis of all studies involving decisions between a two-outcome risky prospect and a sure thing (with equal expected value), Weber et al. (2004) found that all 226 choice situations called for decisions from description.”

“Respondents in the experience and description groups faced structurally identical problems. Yet their choices were dramatically different. Differences in choices were consistent with the assumption that in decisions from experience, rare events had less impact than they deserved on the basis of objective probability (and in decisions from description, rare events had more impact than they deserved). Moreover, the underweighting of rare events in decisions from experience appears to be robust across experimental paradigms:”

“Reliance on small samples of experience not only plays a key role in decisions from experience but also contributes to perception of the world as less variable than it actually is… Although small samples have the result that decision makers explicitly and hence presumably also implicitly underestimate the probability of rare events, underweighting of rare events is likely to emerge in decisions from experience even if people can provide accurate explicit estimates of the probabilities.”

“In decisions from experience, respondents need to update their impression of the options’ attractiveness by combining newly sampled outcomes with their knowledge from previous draws. Such updating can give rise to recency effects (e.g., Hogarth & Einhorn, 1992), that is, to judgments in which recently sampled outcomes receive greater weight than earlier sampled ones.”

“Not only probabilities and outcomes but many kinds of information can be learned through experience or description. Base rates, distributional information, and degrees of causal strength are a few examples. Thus, one might expect the way in which information is learned to influence cognitive processes in many domains. Indeed, in research on Bayesian reasoning, for instance, there is evidence that performance depends on whether base rates are directly experienced or symbolically described”

“In a study of foraging decisions made by bees, Real (1991) observed that “bumblebees under perceive rare events and over perceive common events” (p. 985), when the events are instances of food. To explain why bees’ “probability bias” diverges from that observed in humans, real cited, among other factors, the fact that bees’ samples from payoff distributions are truncated because of memory constraints.”

About the Authors:

Prof. Dr. Ralph Hertwig

BildHertwig.jpg

Ralph Hertwig is assistant Professor of applied Cognitive Science at the Institute for Psychology in the University of Basel. Hertwig has been a research scientist both in the Center for Adaptive Behavior and Cognition at the Max Planck Institute for Human Development in Berlin and at the MPI for Psychological research in Munich, Germany. In 1996 he Hertwig won the 1996 Heinz Heckhausen Young Scientist Prize of the German Society for Psychology. He recieved his PhD (Dr. rer soc.) Summa Cum Laude in Cognitive Psychology from The University of Konstanz in 1995.

Ralph Hertwig homepage

Greg Barron

greg-barron.gif

Greg Barron is an Assistant Professor in the Negotiations, Organizations, and Markets Unit at the Harvard Business School. He came to HBS in 2003 as the CLER (Computer Lab for Experimental Research) Research Fellow in Business Administration. Greg received his B.A. in Psychology from Haifa University and his Ph.D. in Behavioral Sciences from the Technion, Israel Institute of Technology. Prior to obtaining his Ph.D. he worked at Elbit Systems Ltd. as an HR coordinator and at the Carmel Center for Groups as a certified group facilitator. Greg’s primary research interests are in the field of decision making, focusing on the effects of economic incentives on repeated decisions.

Greg Barron Home Page

Elke Weber

weber.gif

Elke Weber is a professor of psychology and Management at Columbia University. She recieved her PhD from Harvard University in 1984. Her research interests include Behavioral models of judgment and decision making under risk and uncertainty. She is also interested in psychologically appropriate ways to measure and model individual and cultural differences in risk taking, specifically in risky financial situations and environmental decision making and policy.

Elke Weber Home Page

Ido Erev

erev.gif

Ido Erev is a member of the William Davidson Faculty of Industrial Engineering and Management as a professor at Technion, Haifa, Israel. His primary research interests are cognitive psychology, Individual decision making under uncertainty, human judgment and subjective probability, behavioral implications of game theory, social dilemmas and attention control.

Ido Erev Home page

November 15, 2004

Gordon Bower

Filed in Profiles
Subscribe to Decision Science News by Email (one email per week, easy unsubscribe)

DECISION SCIENCE RESEARCHER PROFILE: GORDON BOWER

Gordon Bower.gif

Dr. Gordon Bower is considered one of the nation’s leading experimental psychologists and learning theorists. He did some of the earliest work investigating the effect of mood states on memory. In 1959 he received his PhD with distinction from Yale University. That same year Dr. Bower became a member of the psychology faculty at Stanford University and has remained there ever since. Both his research and his Chairmanship of the of the psychology department are in large part responsible for the establishment of Stanford University as a top rated research institution. In 1973, he was elected to the National Academy of Sciences. He served as Senior Scientist for the National Institute of Mental Health (NIMH) in 1993. During that time Dr. Bower co-chaired a panel of scientists gathered together from across the behavioral and social sciences to investigate the current state of mental-health knowledge in those fields. From that work came a guide to develop NIMH into the 21st century entitled Basic Behavioral Science Research for Mental Health: A National Investment. Dr. Bower has also served as president of The American Psychological Society and the Western Psychological Association, and as Senior Science Advisor to the American Psychological Association.

Currently, Dr. Bower is the A. R. Lang Professor of Psychology at Stanford University. Beyond his own research, he contributes to the strengthening of institutions that support scientists. Dr. Bower’s research on the role of emotions in learning has played a significant role in the current resurgence of interest by scientific researchers into the study of emotion.

Field of Expertise and Research Interests:
Conditioning, Learning, Memory, Language Comprehension, Mathematical Models, Computer Simulation of Memorial Processes, Behavior Modification

Academic Career:
1959-present Professor of Psychology at Stanford University

Selected Honors and Affiliations:
1993-Present Science Directorate American Psychological Association, Board of Scientific Advisors
1993-Present Elected Chief Scientific Advisor American Psychological Association, Board of Scientific Advisors
1993 Honorary Doctorate of Science Indiana State University
1992-1993 Senior Science Advisor National Institute of Mental Health, NIH
1991-1993 President American Psychological Society
1991 Honorary Doctorate of Humane Letters University of Chicago
1990-1991 President Western Psychological Association
1989-1990 President Elect Western Psychological Association
1989 President Society of Experimental Psychologists
1989 William James Fellow Award American Psychological Society
1987-1988 Elected Chairman of the Governing Board and President Cognitive Science Society
1983-1986 Associate Dean of Humanities and Sciences Stanford University
1978-1982
Chairman, Stanford University, Psychology Department
Research Advisor, National Institute of Mental Health, NIH
Research Advisor, American Psychological Association
Distinguished-Chair Professor, Stanford University, Psychology
Department
1973 Elected Member National Academy of Science
1959 to present Professor of Psychology at Stanford University

Education:
1959 Ph.D. (With Distinction) Psychology Yale University
1957 M.S. CT Psychology Yale University
1954-1955 Woodrow Wilson Fellowship Philosophy of Science University of Minnesota
1954 B.A. Western Reserve University

Quotes:
“I was sitting there all alone, waiting anxiously for the intruders to break in, when who should happen along but a colleague and former Yale graduate student roommate, Gordon Bower. Gordon had heard we were doing an experiment, and he came to see what was going on. I briefly described what we were up to, and Gordon asked me a very simple question: “Say, what’s the independent variable in this study?” -Philip G. Zimbardo after the Stanford Prison Experiment.

The following is from Emotion and Social Judgments Gordon H. Bower

“In 1976, while studying the impact of various emotional states on memory (Bower et al., 1978; Bower, 1981), I also became interested in mood effects on social judgment. Since the effects of mood on memory probably play a central role in biasing judgments, I will briefly tell you what we were learning from that research. We were finding two effects – one we called “mood-dependent retrieval,” and the other we called “mood-congruent processing”…

Mood-dependent retrieval refers to the idea that a person’s emotional state can become associated with ongoing events, so that the events and the emotion are stored in memory together. Later those memories can be best retrieved if the person returns to an emotional state similar to that experienced during the original event. Thus, when made happy, people should do better recalling events experienced earlier when they were happy. When sad, they should more easily recall events they experienced when they were sad…

It appears that mood-dependent retrieval is at work in a variety of learning and recall situations beyond working with word lists in a laboratory. For example, it applies to people’s recall of autobiographic events. When asked to recall an unselected sample of autobiographic events from their recent past, people will retrieve a biased set of events that agrees with their emotional state during recall…

The second phenomenon (Bower, 1981; 1983) we called mood-congruent processing, which means that a person’s mood can sensitize the person to take in mainly information that agrees with that mood. Material that is congruent with the mood becomes salient so that the person attends to it more deeply than to other material. The person thinks about that material more deeply and associates it more richly with other information (an activity we call associative elaboration). The result is that the person learns this material better than non-mood-congruent material. Thus, when happy, people will attend and respond more to pleasant than unpleasant pars of their environment and learn more about them; when sad, they’ll attend and respond more to its unpleasant than to its pleasant parts and learn more about them…

There’s a mood-congruent advantage: people who were happy during the initial experience learn the happy events better; angry people learn anger-provoking events better; and sad people learn sad events better… Although these results illustrate mood-congruent learning under laboratory-induced moods, available evidence suggests that such selective learning also happens with naturally occurring variations in everyday moods (Mayer et al., in press).”

Gordon Bower CV