Frank and Dinah are playing the PDG (prisoners’ dilemma game). If they both pick A, they both win $2. If they both pick B, they both lose $1. If one picks A and the other picks B, the one who picks A loses $1 and the one who picks B wins $4. If Frank picks B he is making the ___ choice.

Many individuals decide that they feel hungry and eat lunch when they see both hands of the clock on the 12, indicating that it is noontime. This may occur regardless of how recently they ate breakfast. In this example, the conditioned stimulus is the____

a. food they eat for lunch; eating lunch b. number of hours since breakfast; watching the hands of the clock c. act of eating lunch; watching the hands of the clock d. hands of the clock; eating lunch

What is the current prevalence of obesity in North America?

a) Between 10 and 20%. b) Between 20 and 30%. c) Between 30 and 35%. d) Between 35 and 40%.