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Fig. 2 | BMC Geriatrics

Fig. 2

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

Fig. 2

The effect of DIF on test characteristic curves (TCC). The left graph labelled with “All Items” shows the expected total score for the two groups computed from both items with and without DIF. The right graph visualizes the differences between Chinese and Korean elderly in only a subset of items with DIF

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BMC Geriatrics

ISSN: 1471-2318

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