Application of a multidimensional computerized adaptive test for a Clinical Dementia Rating Scale through computer-aided techniques

Table 3 Correlation coefficients, reliabilities, variances, and covariances for the eight domains

Domain	A	B	C	D	E	F	G	H
A		0.55	0.55	0.11	0.28	0.29	0.1	0.27
B	0.91		0.64	0.13	0.31	0.32	0.11	0.31
C	0.92	0.94		0.12	0.29	0.29	0.1	0.32
D	0.88	0.92	0.83		0.06	0.07	0.02	0.06
E	0.95	0.93	0.89	0.89		0.16	0.06	0.16
F	0.93	0.91	0.84	0.89	0.96		0.06	0.17
G	0.82	0.8	0.72	0.79	0.86	0.86		0.06
H	0.8	0.79	0.84	0.74	0.86	0.85	0.79
Variance	0.53	0.69	0.67	0.03	0.16	0.18	0.03	0.22
Reliability^a	0.78	0.75	0.73	0.68	0.78	0.75	0.69	0.63
Item length	14	6	3	5	5	5	9	6
Reliability^b	0.72	0.5	0.41	0.43	0.43	0.43	0.69	0.5
Mean in logit	− 0.92	− 0.69	− 0.01	− 0.86	− 0.61	− 0.71	− 0.97	− 0.44
SD	0.02	0.03	0.03	0.01	0.01	0.01	0.01	0.02

Correlation coefficient: lower left; covariance: upper right; ^aMCAT reliabilities; ^bCAT reliabilities (i.e., Cronbach’s α values)

ISSN: 1744-859X