2 - Lecture Unit Flashcards
What is decision making?
Decision Making can be defined as selecting one option from a
set of possible options.
The choice made has consequences for the individual that makes the decision.
Both x and y factors influence people’s decision making abilities. x and y?
cognitive and social factors
What is the difference between risky and risk-free decision making?
Risky decision making involves uncertainty about outcomes, while risk-free decision making has known outcomes.
What is the formula for expected utility?
Expected utility = probability of outcome × utility of outcome
According to the expected utility theory, what do people choose in decision making?
The expected utility theory holds that, in decision making, people choose the option that maximises the expected utility for them.
When is an individual can be called risk-averse?
If an individual strictly prefers a sure thing to a gamble with the same expected utility, we call this individual risk averse.
How does risk aversion relate to expected utility?
A risk-averse person prefers a sure thing over a gamble with the same expected utility.
Who developed Prospect Theory?
Daniel Kahneman and Amos Tversky - based on the idea of utility-focused decision making.
Expected utility theory assumes that…
- expected utility is linear in probabilities
- preferences are related to wealth rather than gains and losses
Initial step of Prospect Theory?
replace the notion of utility (usually defined only in terms of net wealth) by value (defined in terms of gains and losses as deviations from a reference point)
What are the two phases of decision making in Prospect Theory?
Editing phase and Evaluation phase
Explain editing phase
- the decision problem is represented. Information perceived as unimportant is discarded.
- A reference point is established and the outcomes of the possible options are represented as possible gains and losses.
Explain evaluation phase
The potential choices are evaluated, using preconceived attitudes towards risk, gains and losses.
Name key features of Prospect Theory.
- Certainty
- Small probabilities
- Relative positioning
- Loss aversion
- Diminishing sensitivity
- Reference point
- Framing effect
Features of the Prospect Theory: Certainty?
People underweight outcomes that are merely probable in comparison with outcomes that are obtained with certainty.
Features of the Prospect Theory: Small probabilities?
They tend to give unjustified weight to things very unlikely to occur, regardless of whether they represent a gain or a loss (e.g. lottery, insurance).
Features of the Prospect Theory: Relative positioning?
They respond differently to a risk depending on whether the outcome is a gain or a loss.
Features of the Prospect Theory: Loss aversion?
People are far more sensitive to possible losses than to possible gains. They have a natural loss aversion!
Features of the Prospect Theory: Diminishing sensitivity?
Diminishing sensitivity as losses or gains mount
Features of the Prospect Theory: Reference point?
People think in terms of expected utility relative to a reference point (e.g. current wealth) rather than absolute outcomes.
Features of the Prospect Theory: Framing effect?
risk aversion in the positive frame vs. risk seeking in the negative frame
When it comes to gains, people do not want to take any risk. However, when it comes to losses people suddenly become risk takers.
What does Framing Effect refer to?
The framing effect refers to the fact that people’s decision making is often influenced by irrelevant details given in a scenario.
People make different decisions based on how identical outcomes are framed—as gains or losses.
demonstrate the asymmetry between gain and loss
scenarios that is assumed by prospect theory.
What was the result of the disease scenario experiment?
Positive framing led to risk-averse choices; negative framing led to risk-seeking choices.
What does the value function in Prospect Theory show?
Concave for gains (risk-averse), convex for losses (risk-seeking), with losses felt more strongly than equivalent gains.