Table 5.

Cronbach α coefficients of the six sub-scales across studies

Sub-scale	AU	EM	PG	PL	PR	SA
Present study	.60	.70	.71	.78	.78	.75
Ryff and Keyes (1995)	.37	.49	.40	.33	.56	.52
Van Dierendonck (2004)	.47	.51	.50	.24	.40	.60
Cheng and Chan (2005)	.55	.63	52	.68	.65	.56
Li (2014)	.60	.75	.74	.73	.71	.75
Chan et al. (2017)	.77	.87	.82	.88	.77	.80

AU Autonomy, EM Environment mastery, PG Personal growth, PL Purpose in life, PR Positive relations with others, SA Self-acceptance