| A. Mand | I. Motivating operation and specific consequence. |
| B. Tact | II. Labeling and describing the environment. |
| C. Echoic | III. Correspondence between the sound heard and the sound produced. |
| D. Intraverbal | IV. Essential for maintaining dialogue. |
1
A-I, B-II, C-III, D-IV
2
A-IV, B-III, C-II, D-I
3
A-I, B-II, C-IV, D-III
4
A-IV, B-III, C-I, D-II