It takes Karen 30 minutes to complete 20 multiplication examples. ...

[charchew]

It takes Karen 30 minutes to complete 20 multiplication examples. Her teacher wants this reduced to 15
  minutes. The most appropriate design for this example is:
 
  a. reversal design
  b. multiple baseline design
  c. changing criterion design
  d. AB design

Question 2

The experimental design that would be most appropriate for systematically increasing the number of
  workbook pages completed by a student is:
 
  a. alternating treatments design
  b. changing criterion design
  c. AB design
  d. changing conditions design

[wilsonbho]

Answer to Question 1

C

Answer to Question 2

B