Bobby's parents are concerned about his tendency to act violently ...

[schs14]

Bobby's parents are concerned about his tendency to act violently toward his friends.
 
  To change his behavior, Bobby's parents adopt a strategy where they reward him for not acting violently within a 30-minute period, followed by rewarding after a one-hour period, followed by rewarding after a two-hour period, and so on. In terms of intrasubject research designs, it appears that Bobby's parents are using a technique similar to a __________.
 
   a. AB
   b. ABAB
   c. multiple-baseline
   d. changing-criterion

Question 2

A group of psychologists studying humor reaction studied participants' enjoyment of jokes by recording how many times the participants grinned, smiled, and laughed.
 
  These measurements of grinning, smiling, and laughing to represent enjoyment involve
  a. manipulated variables.
  b. main effects of humor enjoyment.
  c. logistic analysis.
  d. an operational definition of enjoyment.

[Chelseyj.hasty]

Answer to Question 1

d

Answer to Question 2

D

[schs14]

Excellent

[vickyvicksss]

Gracias!