Item bias on the geriatric depression scale (GDS): investigating the quality and generalizability of GDS on Chinese and Korean community-dwelling elderly population

Table 4 The reliability of GDS in four dimensions

Data	IRT-Reliability					Cronbach's Alpha
	EAP/PV Reliability				Person Separation Reliability	Cronbach's Alpha
	D1	D2	D3	D4	Person Separation Reliability	D1	D2	D3	D4
Chinese	0.705	0.659	0.821	0.815	0.980	0.667	0.600	0.801	0.785
Korean	0.784	0.702	0.883	0.849	0.981	0.713	0.597	0.884	0.803
All	0.719	0.639	0.850	0.823	0.987	0.669	0.573	0.844	0.786

ISSN: 1471-2318