Table 1.

Mean, standard deviation, skewness, and kurtosis of the WISC-IV core subtests.

Subtests	Mean	Standard deviation	Skewness	Kurtosis
Vocabulary	7.87	2.87	0.23∗∗	0.60∗∗
Similarities	8.39	3.18	0.07	-0.21
Comprehension	8.19	3.13	-0.06	0.18
Block design	8.83	3.03	0.05	-0.20
Picture concepts	8.96	3.14	-0.24∗	0.19
Matrix reasoning	8.71	3.00	0.09	-0.10
Digit span	8.49	3.15	0.08	0.26
L–N sequencing	8.05	3.12	-0.35∗∗∗	-0.21
Coding	7.33	3.23	0.46∗∗∗	0.41∗
Symbol search	8.11	2.93	-0.23∗∗	0.15

^∗p < 0.05, ^∗∗p < 0.01, ^∗∗∗p < 0.001.