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

Table 7 Test retest reliability estimates over 1.5 years in a subset of the sample with DS (n = 10)

Measure	Test-retest ICC	Mean difference across time	Mean difference p value
Background and benchmark
KBIT-II vocabulary raw score	0.93	−0.30	0.82
KBIT-II riddles raw score	0.88	0.00	1.00
KBIT-II matrices raw score	0.79	−1.10	0.50
CANTAB spatial span span	0.94	0.50	0.10
Hippocampal
CANTAB first trials correct	0.78	0.60	0.69
Computer generated arena^a	–	–	–
Prefrontal
CANTAB ID/ED errors	0.81	−1.80	0.39
Modified dots task inhib. control phase percent correct	0.79	0.11	0.22
Modified dots task combined phase percent correct	0.60	−0.01	0.91
Cerebellar
CANTAB simple RT median corr. latency (ms)	0.27	134.06	0.33
NEPSY visuomotor precision total score^a	–	–	–
Finger sequencing^a	–	–	–

ICC Intraclass correlation
^aToo few subjects received both sessions to measure reliability. In the case of the c–g arena the versions changed from baseline to retest

ISSN: 1866-1955