Table 1.

Pattern of erroneous choices

	Chosen in Phase 1		Chosen in Phase 2		Chosen in Phase 3
	2nd	3rd	1st	3rd	1st	2nd
No microstimulation	9.7	1.0	10.6	3.7	0.6	6.2
Stimulation	16.0	2.5	13.3	9.1	1.2	9.6
Shift	+6.3	+1.5	+2.8	+5.4	+0.5	+3.4

Values are percentages of trials involving each of 6 possible errors. The analysis is based on all trials in which the monkey made a saccade to 1 of the 3 targets during a given phase of the trial. The percentage specifies the fraction of these trials in which the target chosen was inappropriate because it was associated with another phase of the trial.