Table 1.

Mean Laterality Indices (% cerebral blood flow velocity), with t-value for testing difference from zero.

	N	Mean	Range	SD	t-Value	p
Word generation	33	1.69	−5.11 to 5.05	2.53	3.85	.001
Picture description	33	3.28	−5.45 to 7.81	3.17	5.94	<.001
Animation description	33	2.55	−4.67 to 7.07	2.98	4.91	<.001