In the single-subject ABAB design, the letters A and B refer to ...

[geodog55]

In the single-subject ABAB design, the letters A and B refer to different
 
  a) individuals.
  b) controls.
  c) sequences.
  d) measures.

Question 2

Rich is a senior in high school. Although he has maintained good grades, he struggles each day to stay awake. Several of his teachers found that he frequently nods off during class for short periods of time.
 
  The family physician could find no obvious cause for this sleepiness; however, he does recommend an evaluation at a sleep clinic. Which of the following disorders might the physician suspect is the root cause of Rich's problem?
  a) enuresis
  b) narcolepsy
  c) Tay-Sachs disease
  d) sleep terror disorder

[brbarasa]

Answer to Question 1

c

Answer to Question 2

b