Table 7.

Cronbach’s alpha, Person Separation Index (PSI), omega, and average variance extracted (AVE) for the HLS₁₉-NAV based on dichotomous and polytomous data (partly taken from Guttersrud et al. [47] (p. 15) and HLS₁₉ Consortium [17] (p. 213)).

		AT (CATI)	BE (CAWI)	CH (CAWI)	CH (CATI)	CZ (CAWI)	CZ (CATI)	DE (PAPI)	FR (CAWI)	PT (CATI)	SI (CAWI)	SI (CAPI)
Alpha	dichotomous	0.88	0.90	0.88	0.89	0.90	0.87	0.83	0.91	0.92	0.90	0.90
	polytomous	0.92	0.93	0.92	0.88	0.93	0.91	0.88	0.94	0.94	0.94	0.93
PSI	dichotomous	0.68	0.80	0.78	0.68	0.77	0.70	0.73	0.81	0.73	0.74	0.73
	polytomous	0.90	0.92	0.91	0.83	0.92	0.88	0.88	0.93	0.88	0.92	0.91
Omega	dichotomous	0.88	0.91	0.89	0.90	0.91	0.88	0.84	0.92	0.93	0.91	0.91
	polytomous	0.92	0.94	0.92	0.88	0.93	0.91	0.89	0.94	0.94	0.94	0.93
AVE	dichotomous	0.59	0.66	0.61	0.63	0.65	0.57	0.49	0.71	0.76	0.69	0.68
	polytomous	0.58	0.63	0.61	0.49	0.63	0.55	0.48	0.67	0.72	0.66	0.65

AT = Austria, BE = Belgium, CH = Switzerland, CZ = Czech Republic, DE = Germany, FR = France, PT = Portugal, SI = Slovenia; CAPI = computer-assisted personal interviewing; CATI = computer-assisted telephone interviewing; CAWI = computer-assisted web interviewing; PAPI = pen-and-paper personal interview.