Reinforcement of effortful performance in a given academic task has been found to increase the subsequent performance of other academic tasks. The learned-effort hypothesis assumes that individuals learn which dimensions of task performance are correlated with reinforcement of high effort, and generalize across tasks. Therefore, reinforcement of increased effort in a given dimension of one task should result in greater generalized effort in the same dimension of transfer performance than in another dimension. In accord with this view, preadolescent learning-disabled students who received points for high reading accuracy subsequently produced more accurate drawings and stories than did students whose points had been based upon high reading speed or upon mere completion of the reading task. Students who received points for high reading speed subsequently constructed stories more quickly than did children whose points had been based upon high reading accuracy or upon reading-task completion. Consistent with the more explicit and frequent feedback for accuracy than for speed in most academic tasks, generalized accuracy was much more durable than generalized speed.Key words: generalization of effort, speed, accuracy, performance dimensions, learnedeffort hypothesis, token economy, learning-disabled children Why are some students more persistent than others when given difficult academic tasks? Reinforcement interpretations emphasize the previous schedule of reward. Persistence on difficult academic tasks has been found to be greater following intermittent success than after continuous success, which is consistent with well known effects of intermittent reinforcement upon subsequent extinction. For simple sentences and difficult sentences that contained words beyond the children's reading ability. All the children were next asked to read a new set of difficult sentences. The children attempted a greater number of the new sentences following the mixture of success and failure than after success alone.Recent research indicates that reinforcing various types of increased effort can influence the subsequent performance of other types of reinforced behavior. With rats, for example, requiring a greater lever force or a greater number of lever presses per food presentation increased the subsequent persis-