The ABA design works well in _____ studies in which control ...

[soccerdreamer_17]

The ABA design works well in _____ studies in which control groups may not be feasible.
 
  a. field c. commercial
  b. laboratory d. governmental

Question 2

In the ABA design, the treatment is represented by _____.
 
  a. the first A c. the second A
  b. B d. both a and c

[mirabriestensky]

Answer to Question 1

A
In field studies it sometimes is difficult, impractical, or impossible to include a control group. But in the ABA design, each participant serves in both the control (A) and experimental (B) conditions.

Answer to Question 2

B
B represents the treatment; A represents the baseline and the return to baseline after the treatment wears off.