Attention deficit (ADDH) children self-paced the delivery of response pairs for paired-associate learning at about the rate previously shown to be conducive to relatively good learning in attention deficit. The self-pacing opportunity did not seem either to impair or to enhance the learning performance. On methylphenidate they paced themselves at about the same rate but learned much more. Stimulant therapy does not help by "slowing the child down" but permits more effective memorizing at the same presentation rate.