To determine whether the meditation course successfully enhanced participants' metacognitive processing capacity (Hypothesis 2), participants' scores before and after the intervention on the RRS and MAAS were analysed by two-way 2 (time) by 2 (group) ANOVAs.
RRS. Figure 5 represents the mean RRS scores, for each group, at T1 and T2. The meditators demonstrated a significant decrease over the course of the intervention (t[19] = 2.78, p = .01, d = .46), while the nonmeditators demonstrated no significant decrease (t[19] = 1.24, p = .23, d = .13).
There was a highly significant main effect of time (F[1,38] = 8.97, p = .005, ╬À2 = .19), a nonsignificant main effect of group (F<1, ╬À2 < .001), and a nonsignificant time by group interaction (F[1,38] = 2.49, p = .12, ╬À2 = .06).
MAAS. Figure 6 represents the mean MAAS scores, for each group, at T1 and T2. The meditators demonstrated a highly significant increase over the course of the intervention (t[19] = -4.47, p < .001, d = -.76), while the nonmeditators demonstrated no significant increase (t[19] = 1.48, p = .16, d = .15).
There was a highly significant main effect of time (F[1,38] = 11.28, p = .002, ╬À2 = .23), a nonsignificant main effect of group (F[1,38] = .66, p = .42, ╬À2 = .02), and a highly significant time by group interaction effect (F[1,38] = 21.75, p < .001, ╬À2 = .36).