Decision makers evaluate alternatives against an implicit favourite.
Decision makers process perceptuallydistorted information.
Decision makers choose the “goodenough” alternative (satisficing).
implicit favourite
A preferred alternative that the decision maker uses repeatedly as a comparison.
confirmation bias
The process of screening out information that is contrary to our values and assumptions, and to more readily accept confirming information.
psychologists Amos Tversky and DanielKahneman
discovered that human beings have built-in decision heuristics that automatically distort those calculations.
Sequential Evaluation and Implicit Favourite Biases
Rational choice: evaluate alternatives concurrently using unbiased valences and probabilities.
Reality: We use implicit favourite to compare each alternative sequentially.
Why sequential evaluation with an implicit favourite?
Alternatives not all available at same time.
Natural human preference for comparing two choices.
People are cognitive misers (confirmation bias).
Human need for cognitive consistency and coherence.
Biased Decision Heuristics
Rational choice: calculate alternative with highestexpected satisfaction.
Reality: We have built-in decision heuristic biases.
BiasedDecisionHeuristics
Anchoring and adjustment
Availability heuristic
Representativeness heuristic
Anchoring and adjustment:
Adjusting expectations/standards around an initial anchor point (e.g. opening bid).
Anchoring and adjustment
A natural tendency for people to be influenced by an initial anchor point such that they do not sufficiently move away from that point as new information is provided.
Availability heuristic
A natural tendency to assign higher probabilities to objects or events that are easier to recall from memory, even though ease of recall is also affected by nonprobability factors (e.g., emotional response, recent events).
Availabilityheuristic:
Estimating probabilities by how easy event is recalled, even if ease of recall is also due to other factors.
Representativeness heuristic:
Estimating the probability of something by its similarity to known others rather than by more precise statistics.
representativeness heuristic
A natural tendency to evaluate probabilities of events or objects by the degree to which they resemble (are representative of) other events or objects rather
than on objective probability information.
satisficing
Selecting an alternative that is satisfactory or “good enough,” rather than the alternative with the highest value (maximization). or “good enough,” rather than the alternative with the highest value (maximization).
ProblemswithMaximization
Rationalchoice: Maximization is choosing the highest value alternative.
Three human limitations: (Problems with Maximization)
People engage in satisficing – first “good enough”alternative.
People oversimplify the decision process.
People avoid making any decision when too many choices are presented.