Table 1.

Descriptive and inferential statistical indices of the first session.

			Time points
		Pre-assessment	Post-assessment	t-tests	d
Mood	“Currently, my mood is…”	3.56 (1.25)	4.63 (1.25)	t(127) = 6.82∗∗∗	0.64 [M]
Rumination	“Currently, I’m always mulling over the same problems”	3.26 (1.57)	4.61 (1.37)	t(127) = 4.05∗∗∗	0.92 [L]
Tiredness	“Currently, I feel …” [tired vs. alert]	3.13 (1.52)	3.99 (1.46)	t(127) = 3.95∗∗∗	0.59 [M]
Physical strengths	“Currently, I feel …” [flat vs. energetic]	3.24 (1.34)	3.89 (1.37)	t(127) = 3.08∗∗∗	0.47 [S]
Attention	“Currently, I’m able to focus and to keep track”	3.08 (1.27)	4.13 (1.26)	t(125) = 3.87∗∗∗	0.87 [L]
Social interaction	“Currently, I appreciate being in touch with other people”	3.24 (1.67)	4.32 (1.39)	t(125) = 2.85∗∗	0.71 [M]

^∗∗p < 0.01, ^∗∗∗p < 0.001. [S], small effect size; [M], medium effect size; [L], large effect size.