Table 2.

Reliability testing of the AHL-C (N=560)

	Mean ± SD	Range	Reliability coefficient	Item-total correlation
Reading fluency1	14.59 ± 7.78	0–28	0.93	0.25–0.69
Reading test	5.38 ± 3.83	0–12	0.89	0.50–0.68
Clause test	7.06 ± 4.06	0–12	0.92	0.47–0.76
Numeracy	2.14 ± 1.36	0–4	0.70	0.49–0.55
Prior knowledge2	5.27 ± 5.92	0–24	0.95	0.41–0.77
Comprehension	3.24 ± 3.68	0–12	0.91	0.48–0.70
Familiarity	2.04 ± 2.86	0–12	0.96	0.63–0.86
AHL-C total3	19.87 ± 12.52	0–52	0.96	0.18–0.69

¹Sum of Reading test, Clause test, and Numeracy.

²Sum of Comprehension and Familiarity.

³Sum of Reading fluency and Prior knowledge.