Table 1 Participants completing each Wechsler Adult Intelligent Scale—Revised subtest given at first assessment after head injury .

Cognitive test	n	Percentage
Total participants	74	100
Vocabulary	27	36.49
Similarities	66	89.19
Digit span	71	95.95
Arithmetic	47	63.51
Picture completion	47	63.51
Picture arrangement	46	62.16
Digit symbol	32	43.24
Block design	59	79.73