The posttraumatic stress disorder (PTSD) prevalence rates of U.S. veterans returning home from the war in Vietnam was directly related to their separation from family.

a. high rates of drug addiction.
b. youth and inexperience

Which of the following statements about punishment is NOT true?

a. Punishment does not always work. b. Rewards should always immediately follow punishments. c. Effective punishment is consistent punishment. d. In itself, punishment serves to inhibit responses.

Before they are 10 years old, children are __________ as likely to die from a(n) __________ as from a(n) __________

a) twice; injury; illness b) three times; illness; injury c) two times; illness; injury d) four times; injury; illness