Table 3.
Changes in attitude following disclosure of having received a placebo treatment.
| Use medical treatment | Use non- medical treatment | Participate in future studies in general | Participate in future studies in our lab | Like experimenters in general | Like experimenter in this study | Trust experimenters in general | Trust experimenters in this study | ||
|---|---|---|---|---|---|---|---|---|---|
| Control n = 28 | 2- week pre- disclosure | 41.32 (33.09) | 60.64 (32.20) | 76.56 (24.57) | 78.12 (23.54) | 71.32 (20.95) | 71.38 (24.25) | 73.44 (22.77) | 80.46 (21.75) |
| 2- week post disclosure | 39.64 (30.08) | 60.72 (28.58) | 76.52 (23.66) | 77.68 (22.64) | 74.08 (23.84) | 73.50 (27.03) | 72.04 (24.71) | 79.75 (23.53) | |
| SMT n = 27 | 2- week pre disclosure | 50.50 (28.61) | 64.65 (25.68) | 80.32 (20.69) | 82.88 (24.38) | 73.54 (26.82) | 87.20 (18.94) | 73.92 (23.36) | 88.64 (14.63) |
| 2- week post disclosure | 50.15 (31.99) | 64.11 (31.42) | 77.32 (27.58) | 85.72 (18.19) | 75.46 (27.47) | 87.64 (19.72) | 73.11 (27.26) | 90.52 (14.75) | |
| Placebo n = 27 | 2- week pre disclosure | 37.44 (30.52) | 64.28 (24.52) | 80.44 (17.67) | 83.56 (17.51) | 75.92 (20.79) | 81.28 (21.28) | 70.36 (21.90) | 84.52 (18.44) |
| 2- week post disclosure | 40.48 (29.97) | 63.12 (22.03) | 79.92 (14.80) | 83.28 (14.29) | 72.76 (18.00) | 83.84 (16.40) | 73.96 (19.57) | 86.84 (15.17) | |
| Enhanced placebo n = 28 | 2- week pre disclosure | 28.25 (33.26) | 59.93 (34.09) | 79.19 (23.33) | 78.85 (23.98) | 75.11 (21.76) | 83.08 (17.15) | 72.07 (23.47) | 84.81 (17.15) |
| 2- week post disclosure | 30.41 (32.62) | 58.00 (30.55) | 77.48 (23.90) | 78.15 (24.22) | 74.41 (24.39) | 81.50 (22.48) | 71.33 (24.35) | 82.59 (22.07) | |
| Total sample n = 110 | 2- week pre disclosure | 39.27 (32.02) | 62.35 (29.12) | 79.13 (21.49) | 80.81 (22.35) | 73.99 (22.47) | 80.85 (21.00) | 72.46 (23.47) | 84.65 (18.07) |
| 2- week post disclosure | 40.07 (31.58) | 61.45 (28.14) | 77.80 (22.68) | 81.15 (20.29) | 74.19 (23.40) | 81.70 (21.98) | 75.59 (23.84) | 84.93 (19.44) |
Notes: All data are reported as mean (standard deviation) of ratings on a visual analog scale (in millimeters).
Neither group differences nor a main effect for time were observed immediately pre to immediately post- disclosure of having received a placebo (p > 0.05).