Table 1 Improvement of neuropsychological function after the lightning strike.

	Test results in z scores
	7 weeks after injury	20 weeks after injury	18 months after injury
Ruff 2 and 7	−1.1	−0.8	−0.4
CVLT	0.9	1.4	2.4
RVDLT	−0.7	0.4	0.2
Full‐scale IQ (WAIS‐R)	0.8	0.9	1.3

CVLT, California Verbal Learning Test; RVDLT, Rey Visual Design Learning Test; WAIS‐R, Wechsler Intelligence Scale for Adults—Revised.

Results of the Ruff 2 and 7 (visual detection), CVLT (verbal memory), RVDLT (non‐verbal learning) and the full‐scale IQ, all transformed into z scores, are shown. A z score between –1 and 1 means that the performance of an individual is within 1 SD from the performance of a normal control of the same age and education. A z score smaller than –1 or bigger than 1 is interpreted as a significant difference.