smoothed absolute speed over the last 200 msec of the
trial [r(2098) 5 2.01, p 5 .66], with maximum change
in smoothed speed over that period [r(2098) 5 2.02, p 5
.40], or with minimum change in smoothed speed over
that period [r(2098) 5 2.001, p 5 .95].