Lecture 3

Question 1

What does it mean if a subject has a preference circle?

Answer 1

They have violated transitivity tf the model doesn’t hold for them (they are not the designated user)

Question 2

Learn table in notes (top one)

Answer 2

Now

Question 3

3 types of ‘ingredients’ in a decision problem?

Answer 3

Options (eg. Flick/don’t flick lighter)

States (eg. If enough/not enough gas for explosion)

Outcomes (eg. Explosion/no explosion)

Question 4

Where do options/acts and where do states go on a decision table?

Answer 4

LHS - options

Top - states

Question 5

What must the problem specification be? (2)

Answer 5

Definite and complete

Question 6

What must the states be? (2)

Answer 6

Mutually exclusive and exhaustive

Question 7

See decision tree example in notes and slides 20–21 for more complex example

Answer 7

Now

Question 8

What is the decision node and what is the chance mode?

Answer 8

Decision node - any node before the subject makes a decision

Chance node - any node that comes before the states

Question 9

Explain how you go from a decision tree to a decision table?

Answer 9

Since tables represent a one-time act/option, we go from a decision tree to table by COLLAPSING THE MULTISTAGE into ONE-TIME DECISION OF STRATEGIES

Question 10

Define a strategy?

Answer 10

A plan that determines an agent’s choices under all relevant circumstances