Table 4. Numbers of sessions to which individual subjects were exposed in the initial and replication conditions, where applicable, in the PR condition. Average (and standard deviation) values for PR breakpoint and peak responses emitted per session in the final four stable sessions are provided.
| Subject | Reinforcer | Sessions | PR Breakpoint (SD) | Peak Resp. Output (SD) |
| G1 | Food | 12 (17) | 535.2 (157.0) | 5435.6 (1641.7) |
| Fat | 10 | 164.0 (56.0) | 1560.7 (578.8) | |
| P1 | Food | 10 (11) | 367.4 (92.6) | 3681.2 (965.4) |
| Fat | 17 | 80.5 (18.0) | 709.5 (184.2) | |
| B2 | Food | 12 (19) | 595.3 (111.8) | 6059.0 (1168.6) |
| Fat | 10 | 231.8 (26.1) | 2267.7 (272.3) | |
| R2 | Food | 11 | 741.0 (175.0) | 7585.2 (1831.0) |
| Fat | 13 (11) | 216.5 (36.3) | 2108.9 (378.0) | |
| B3 | Food | 13 | 685.0 (77.8) | 6997.0 (811.5) |
| Fat | 16 (11) | 92.1 (17.1) | 826.5 (173.7) | |
| B4 | Food | 12 | 269.5 (27.5) | 2659.5 (282.5) |
| Fat | 16 (10) | 171.1 (33.1) | 1640.0 (340.3) |