Table 4.

Fitness indices for assessing the factorial invariance of the EDDPsic.

Variable	Model	χ 2	Δχ2	p	gl	NNFI	CFI	ΔCFI	RMSEA	ΔRMSEA
Age	Configurational	412.35	–	–	250	0.915	0.931	–	0.065	–
	Weak	433.93	21.58	0.06	263	0.915	0.927	−0.004	0.065	0.000
	Strong	448.27	14.33	0.35	276	0.918	0.926	−0.001	0.064	0.003
	Strict	468.29	20.02	0.33	294	0.922	0.926	−0.001	0.063	0.004
Sex	Configurational	419.73	–	–	250	0.911	0.927	–	0.067	–
	Weak	433.93	14.20	0.36	263	0.915	0.927	−0.001	0.065	0.004
	Strong	448.27	14.33	0.35	276	0.918	0.926	−0.001	0.064	0.003
	Strict	468.29	20.02	0.33	294	0.922	0.926	−0.001	0.063	0.004
Academic stage	Configurational	422.61	–	–	250	0.904	0.921	–	0.068	–
	Weak	444.48	21.87	0.057	263	0.904	0.917	−0.004	0.067	0.000
	Strong	458.38	13.90	0.381	276	0.908	0.917	0.000	0.066	0.004
	Strict	516.40	58.02	4.2e-6*	294	0.895	0.899	−0.018	0.071	−0.013

According to Cheung and Rensvold (2002) ΔCFI ≤ −0.01 and according to Vandenberg and Lance (2000) a RMSEA ≤ 0.06 implies that the invariance assumption still holds.

^*p ≤ 0.05.