Development and validation of the Arizona Cognitive Test Battery for Down syndrome

Table 3 Distribution data for each battery measure in the group with Down syndrome

Measure	n^a	% not completed	% floor	Mean	SD	Range	Skewness	Kurtosis
Background and benchmark
SIB-R adaptive behavior standard score	70	5.4	10.0	36.50	25.28	2–89	0.18	−0.89
KBIT-II verbal score	70	5.4	0.0	22.53	11.95	2–59	0.66	0.73
KBIT-II non-verbal score	70	5.4	5.7	11.89	5.64	0–27	−0.23	0.24
CANTAB spatial span span	66	10.8	33.3	2.30	1.27	1–6	0.67	−0.08
Hippocampal
CANTAB PAL first trials correct	71	4.1	14.1	7.42	6.01	0–22	0.42	−0.80
Computer generated arena % time in the target quadrant	63	14.9	22.2	24.05	20.22	0–77	0.54	−0.26
Prefrontal
CANTAB ID/ED errors per stage (ln transformed)	67	9.5	14.9	5.45	3.99	1.33–26	−0.85	0.27
Modified dots task inhib. control phase percent correct	65	8.5	29.2	63.59	31.85	0–100	−0.41	−.92
Modified dots task combined phase percent correct	65	8.5	41.5	54.13	18.30	15–100	1.08	1.15
Cerebellar
CANTAB simple RT median corr. latency (ms)	66	10.8	25.8	735.26	321.39	275–1,656	0.79	0.10
NEPSY visuomotor Precision total score	48	9.4	0.0	15.24	4.57	3–21	−0.73	0.10
Finger sequencing mean correct sequences^b (all trials)	11	9.1	18.0	230.56	51.70	144–321	0.30	0.67

^an varies based on the introduction of the measure, total original n = 74, ^bbased on the computerized version of the task

ISSN: 1866-1955