TABLE 1.

Average expression of gratitude in person and average scores obtained in the Satisfaction With Life Scale (SWLS) as a function of gratitude exposure on Facebook (control vs. gratitude exposure) and time (pre- vs. post-manipulation).

	Gratitude exposure on Facebook
	Control	Gratitude exposure
	Expression of gratitude in person
Post-manipulation
M (SD)	3.08 (1.08)	3.62 (0.88)
SEs	0.22	0.18
Bootstrap 95% CIs	[2.64, 3.48]	[3.29, 3.96]
	Satisfaction with life (SWLS)
Pre-manipulation
M (SD)	4.70 (0.75)	4.53 (1.11)
SEs	0.15	0.23
Bootstrap 95% CIs	[4.42, 4.98]	[4.09, 4.96]
Post-manipulation
M (SD)	4.62 (0.77)	4.81 (1.07)
SEs	0.15	0.22
Bootstrap 95% CIs	[4.33, 4.92]	[4.39, 5.23]

Average expression of gratitude in person ranged from 1 “never” to 5 “very frequently,” while SWLS scores from 1 to 7, with higher scores indicating higher levels of satisfaction with life. Standard deviations (SDs) are displayed in parentheses. Bootstrap estimates for 95% confidence intervals (CIs) of the means were obtained with 5,000 resamples.