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Fig. 6 | BMC Psychiatry

Fig. 6

From: Validation and psychometric properties of the Somatic and Psychological HEalth REport (SPHERE) in a young Australian-based population sample using non-parametric item response theory

Fig. 6

Difficulty and discrimination of the 20 items suitable for the anxiety-depression scale. The first principal component corresponds to the difficulty of the items, the easiest items being on the right (items 26 and 23). The second principal component measures the items’ discrimination (item 2 being the most discriminant)

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BMC Psychiatry

ISSN: 1471-244X

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