Figure 7.

Closed-loop performance measures across testing sessions. In all closed-loop sessions, the target radius was automatically increased or decreased after each block to maintain approximately a 70% hit rate thus making the mean target radius a more useful measure of performance. P-values in the lower plots refer to the probability the slope of a least squares regression line through the data was zero. Note, monkey II’s percentage of targets hit in the four-target task consistently exceeded 70% due to the limit set on how small the target could become and due to the number of early blocks where performance exceeded 70% before the target got small enough to challenge the animal.