Table 4.
Subject interpretations of their assigned treatment probabilities and perceptions of pill received
| Assigned Treatment Probability | Likelihood of Receiving Caffeine (n=200) | Pill Subject Thought He/She Received (n=198) | |||||
|---|---|---|---|---|---|---|---|
| Very Unlikely | Unlikely | Neither | Likely | Very Likely | Caffeine | Placebo | |
| 0.1 | 11 (55%) | 5 (25%) | 1 (5%) | 2 (10%) | 1 (5%) | 1 (5%) | 19 (95%) |
| 0.2 | 10 (50%) | 7 (35%) | 2 (10%) | 1 (5%) | 0 | 2 (10.5%) | 17 (89.5%) |
| 0.3 | 3 (15%) | 12 (60%) | 2 (10%) | 1 (5%) | 2 (10%) | 6 (30%) | 14 (70%) |
| 0.4 | 2 (10%) | 15 (75%) | 2 (10%) | 1 (5%) | 0 | 7 (35%) | 13 (65%) |
| 0.5 | 3 (7.5%) | 2 (5%) | 27 (67.5%) | 6 (15%) | 2 (5%) | 13 (32.5%) | 27 (67.5%) |
| 0.6 | 0 | 2 (10%) | 2 (10%) | 14 (70%) | 2 (10%) | 7 (36.8%) | 12 (63.2%) |
| 0.7 | 1 (5%) | 2 (10%) | 3 (15%) | 13 (65%) | 1 (5%) | 11 (55%) | 9 (45%) |
| 0.8 | 2 (10%) | 0 | 1 (5%) | 8 (40%) | 9 (45%) | 16 (80%) | 4 (20%) |
| 0.9 | 0 | 1 (5%) | 0 | 6 (30%) | 13 (65%) | 16 (80%) | 4 (20%) |
| Total | 32 (16%) | 46 (23%) | 40 (20%) | 52 (26%) | 30 (15%) | 79 (39.9%) | 119 (60.1%) |