Table 1. Summary of included data.

Analyses were conducted on ‘triplets,’ consisting of a combination of A, B, and AB conditions. If the spikes evoked by the A and B stimuli failed to follow Poisson distributions with substantially separated means, the triplet was excluded from analysis. This table shows the numbers of triplets that survived these exclusion criteria for each brain area and type of stimulus condition (last column), as well as the numbers of monkeys, distinct units, and sessions that they were derived from (columns 6–9).

1. Stimuli	2. Brain area	3. Task	4. Monkeys	5. Available sessions	6. Sessions for which at least one triplet was included	7. Available units	8. Units for which at least one triplet was included	9. Triplets passing exclusion criteria for analysis
Adjacent	V1	Attention	ST, BR	16	16	1604	935	1389
	V4	Fixation	BA, HO	17	17	991	274	456
Superimposed	V1	Fixation	ST, BR	25	23	2304	770	1686
	V4	Fixation	JD, SY	21	21	1744	817	1529