Similar to Experiment 1, MAST EXP participants exhibited a greater numerical increase in sAA, which failed to reach significance (MAST EXP : t (41) = 1.75, p = 0.088, d = 0.27, 95% CI = −0.05–0.64; MAST PLC : t (41) = 0.47, p = 0.64, d = 0.07, 95% CI = −0.24–0.37).
We did not observe evidence for a Condition × Time interaction for sAA ( F (1,77) = 0.81, p = 0.37, η 2 G < 0.01, 95% CI = 0.00–0.03; n = 1 missing data), although MAST EXP participants ( t (39) = 2.00, p = 0.05, d = 0.32, 95% CI = 0.04–0.56), but not MAST PLC participants ( t (38) = 1.23, p = 0.23, d = 0.20, 95% CI = −0.15–0.56), exhibited a marginally significant pre-to-post increase in sAA.