Table 2.

Perceived intervention effectiveness ratings (mean ± SEM) across sessions

Group	IS 1	IS 2	IS 3	IS 4	Total
Control	2.38 (0.53)	3.61 (0.63)	2.93 (0.58)	3.19 (0.61)	3.03 (0.54)
Placebo	1.89 (0.45)	3.48 (0.46)	4.19 (0.58)	6.08 (0.56)	3.91 (0.44)
Mindfulness	3.32 (0.53)	3.96 (0.66)	4.28 (0.51)	4.23 (0.54)	3.95 (0.52)
Sham	3.75 (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.