Health and Quality of Life Outcomes

Table 3 Reliability and discrimination of the eight item Lipkus numeracy scale (N = 140)

From: How discriminating are discriminative instruments?

Item	Alpha if item	Delta if item	Delta for item	Short form A	Short form B	Short form C
	deleted	deleted
Q1	0.74	0.88	0.97		+	+
Q2	0.77	0.90	0.72		+
Q3	0.71	0.92	0.49	+		+
Q4	0.70	0.91	0.71	+		+
Q5	0.71	0.92	0.40	+		+
Q6	0.71	0.92	0.43	+
Q7	0.74	0.91	0.72		+
Q8	0.76	0.85	0.99		+
Scale Alpha	0.76			0.85	0.51	0.72
Scale Delta	0.92			0.56	0.95	0.82

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ISSN: 1477-7525

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