If a person suffering from schizophrenia has an identical twin, what percent chance does the other twin have of also becoming schizophrenic?

Which of the following statements correctly describes the rate of PTSD among combat-exposed military personnel since 2001?

a) PTSD has remained stable since 2001, since there have been no new combat experiences for soldiers since 2001. b) Since PTSD is more fully understood, PTSD has declined in soldiers due to better medications. c) The rate of PTSD has tripled since 2001. d) PTSD has increased in combat-exposed women but not in combat-exposed men since 2001.

In Pavlov's experiment, the dog salivating to food is an example of a(n) __________

a. unconditioned response (UCR) b. conditioned response (CR) c. unconditioned stimulus (UCS) d. conditioned stimulus (CS)