Fig. 3.

TE and TE + TEO removals slow task learning. Monkeys with TE and TE + TEO removals take longer than controls and monkeys with TEO removals to reach criterion (75% correct overall) on the final 3 training sets. Within groups, each monkey’s data are plotted as a different shape. A solid shape indicates the monkey reached criterion on that set, whereas a hollow shape indicates the monkey’s performance plateaued below criterion. Bars represent group means, including monkeys that did not reach criterion.