Table 2.

Schmid–Leiman hierarchical factor matrix of WAIS and D–KEFS measures

WAIS and D-KEFS measures	Higher order factor	F1	F2	F3	h2	u2
Vocabulary	0.633	0.042	0.614	0.080	0.786	0.214
Similarities	0.597	0.203	0.410	0.068	0.570	0.430
Information	0.606	0.194	0.492	0.130	0.664	0.336
Block design	0.643	0.484	0.023	0.078	0.654	0.346
Matrix reasoning	0.602	0.413	0.135	0.002	0.551	0.449
Picture arrangement	0.493	0.397	0.060	0.004	0.404	0.596
Object assembly	0.538	0.473	0.042	0.060	0.519	0.481
Picture completion	0.581	0.393	0.086	0.216	0.546	0.454
Arithmetic	0.673	0.057	0.377	0.170	0.627	0.373
Digit span	0.526	0.113	0.390	0.191	0.478	0.522
Letter number	0.620	0.195	0.421	0.322	0.703	0.297
Digit symbol	0.659	0.182	0.069	0.468	0.691	0.309
Symbol search	0.638	0.211	0.071	0.425	0.637	0.363
Trail making	0.708	0.182	0.028	0.419	0.711	0.289
Fluency	0.592	0.099	0.294	0.328	0.554	0.446
Sorting	0.703	0.257	0.247	0.131	0.638	0.362
Twenty questions	0.526	0.127	0.162	0.182	0.352	0.648
Tower test	0.436	0.215	0.104	0.076	0.253	0.747
Percentage of common variance	36.3	7.3	8.3	5.5	57.4	42.6

F1, F2 and F3 represent first-order factors. h²= commonality; u²= uniqueness.