Table 2.

Convergent and concurrent validity, reliability, and test of significance in means

	Pearson's correlation	ICC average measures	Cronbach's α	Z test			T test
				z	p (Z<=z) two‐tail	z Critical two‐tail	t	df	p
BDI‐II BV first time (n = 111)		.920*	.926
BDI‐II BV and DASS21‐BV Depression subscale (n = 47)	.920*	.939*	.959
BDI‐II BV and BDI‐II (n = 25)	.985*	.992*	.993				1.193	24	.244
BDI‐II BV (n = 49)test–retest	.960*	.979*	.979	0.2618	.7938	1.9599
BDI‐II BV among diagnosed casea (n = 73) and nonsufferer (n = 38)							12.235	109	<.001

^aSuffering from depressive disorder or episode.

^*1% level of significance (p < .01, two‐tailed).