Table 2.

Perceived intervention effectiveness ratings (mean ± SEM) across sessions

GroupIS 1IS 2IS 3IS 4Total
Control2.38 (0.53)3.61 (0.63)2.93 (0.58)3.19 (0.61)3.03 (0.54)
Placebo1.89 (0.45)3.48 (0.46)4.19 (0.58)6.08 (0.56)3.91 (0.44)
Mindfulness3.32 (0.53)3.96 (0.66)4.28 (0.51)4.23 (0.54)3.95 (0.52)
Sham3.75 (0.35)4.21 (0.40)3.53 (0.35)3.93 (0.36)3.85 (0.32)
  • There were no significant differences in perceived intervention effectiveness between the mindfulness and sham-mindfulness meditation (sham) groups across intervention sessions (IS). In contrast, the placebo conditioning group's perceived effectiveness of the placebo cream increased more rapidly over time relative the time course of the other group's respective perceived intervention effectiveness ratings.