Table 2.

Percentage variance accounted for in binned mean fMRI time series by sustained and transient models of attention signals. In the sustained model, the attention signal was assumed to be a step function that began at cue presentation and continued until the end of the response period (as in Figure 3 and Supplementary Figure 2). The transient model assumed an attention signal that was associated with allocation of attention at cue presentation but did not persist through the delay period. The sustained attention model accounted for more variance than the transient attention model for 22 out of 24 subject/cortical area combinations.

	Attended part of visual field			Unattended part of visual field
Subject	V1	V2	V3	V1	V2	V3
MAS - sustained	76	92	86	74	76	59
MAS - transient	16	10	15	49	48	41
DBR - sustained	74	83	85	69	60	21
DBR - transient	29	19	20	6	0.5	19
RAS - sustained	61	57	74	72	45	67
RAS - transient	51	39	38	50	18	25
JM - sustained	0.1	0.3	5	69	68	55
JM - transient	1	4	0.6	6	4	0.3