Table 1.

Average stop signal reaction times for the two monkeys

Subject	Integration					Mean of the inhibition function
	1st SSD (ms)	2nd SSD (ms)	3rd SSD (ms)	4th SSD (ms)	Mean (ms)	Raw (ms)	Weibull (ms)	Spline (ms)
Monkey B	174	159	142	95.7	142.7	92.8	147	146
Monkey E	201	169	147	106	155.8	106	164	163

The first five columns relate to the method of integration. They list the SSRT calculated individually from the first four stop signal delays and their mean value. The next three columns relate to three different estimates based on the mean of the inhibition function. They list the SSRTs calculated from the raw behavioral data, from fitting the data with a Weibull function and from fitting the data with a monotonic spline.