Table 3.

Performance scores of G.P. and V.B. on the event-based PM task. t-tests for significant differences of individual scores from average scores of groups of normal controls are also reported.

	G.P.	NCs  (N = 8)  M (SD)	t	P	V.B.	NCs  (N = 8)  M (SD)	t	P
Number of target words signaled during each block
Forward ongoing task
1 target word	2	3.5 (0.8)	1.89	.05*	3	3.8 (0.5)	1.54	.08
4 target words	1	3.5 (0.8)	3.14	.01*	1	2.3 (1.8)	0.67	.26
Backwards ongoing task
1 target word	2	3.4 (0.5)	2.53	.02*	2	3.8 (0.5)	3.59	.01*
4 target words	1	1.8 (1.5)	0.48	.32	0	1.9 (1.2)	1.43	.10
Total	6	12.1  (2.2)	2.59	.02*	6	11.6  (2.3)	2.28	.03*
Number of target words recalled at the end of each block
Forward ongoing task
1 target word	1	1.0 (0.0)	0.00	.50	1	1.0 (0.0)	0.00	.50
4 target words	2	2.9 (1.1)	0.73	.24	4	2.6 (1.7)	0.77	.23
Backwards ongoing task
1 target word	1	1.0 (0.0)	0.00	.50	1	1.0 (0.0)	0.00	.50
4 target words	0	2.2 (1.5)	1.43	.10	2	2.0 (1.1)	0.00	.50
Total	4	7.1  (2.0)	1.45	.10	8	6.6  (2.3)	0.58	.29
Number of target words recognized at the end of each block
Forward ongoing task
1 target word	1	1.0 (0.0)	0.00	.50	1	1.0 (0.0)	0.00	.50
4 target words	2	3.3 (1.0)	1.18	.14	3	2.6 (1.7)	0.22	.41
Backwards ongoing task
1 target word	1	1.0 (0.0)	0.00	.50	1	1.0 (0.0)	0.00	.50
4 target words	1	2.8 (1.4)	1.19	.14	3	2.4 (1.1)	0.51	.31
Total	5	8.0  (1.9)	1.49	.09	8	7.4  (3.1)	0.18	.43

*Significant difference.