TABLE 2.

Results of simple and multiple mediation models.

	STD. estimate	Estimate	SE	Boot 95% CI
				Lower	Upper
Simple mediation: gratitude 2 weeks
Paths
Group → Grat2w	0.077	0.684	0.596	–0.515	1.822
Grat2w → well-being	0.497	0.082	0.014	0.056	0.109
GratPre → Grat2w	0.572	0.525	0.068	0.396	0.663
Total effect	0.175	0.255	0.111	0.033	0.466
Direct effect	0.136	0.199	0.108	–0.014	0.407
Indirect effect	0.038	0.056	0.050	–0.042	0.159
Simple mediation: gratitude 4 weeks
Paths
Group → Grat4w	0.287	3.076	0.932	1.150	4.802
Grat4w → well-being	0.435	0.059	0.012	0.036	0.084
GratPre → Grat4w	0.436	0.482	0.089	0.320	0.670
Total effect	0.192	0.281	0.115	0.059	0.508
Direct effect	0.067	0.099	0.127	–0.155	0.340
Indirect effect	0.125	0.183	0.066	0.071	0.335
Multiple mediation: gratitude 2 and 4 weeks
Paths
Group → Grat2w	0.078	0.690	0.595	–0.511	1.827
Group → Grat4w	0.302	3.187	0.946	1.156	4.925
Grat2w → well-being	0.408	0.066	0.016	0.032	0.097
Grat4w → well-being	0.205	0.028	0.014	0.001	0.055
GratPre → Grat2w	0.571	0.524	0.068	0.394	0.661
GratPre → Grat4w	0.408	0.446	0.086	0.281	0.617
Total effect	0.176	0.253	0.110	0.035	0.460
Direct effect	0.082	0.118	0.112	–0.108	0.330
Total indirect effect	0.094	0.135	0.065	0.018	0.277
Specific indirect effects
Group → Grat2w → well-being	0.032	0.046	0.042	–0.031	0.140
Group → Grat4w → well-being	0.062	0.089	0.053	0.012	0.230

Boot 95% CI, bias-corrected bootstrapped 95% confidence intervals; Grat_Pre, gratitude baseline; Grat_2w, gratitude assessment 2 weeks after baseline; Grat_4w, gratitude assessment 4 weeks after baseline; SE, standard error; STD, standardized.