Objective: To investigate single and combined effects of stimulant medication and contingencies on the performance of ADHD children with tasks involving different cognitive demands. Method: Children diagnosed with ADHD participated in a within-subjects design. At two separate sessions, children on either medication or placebo (administered in a…

The effects of different schedules of noncontingent reward on subsequent learning in children were investigated. In the first phase of the experiment subjects performed a block-design matching task and received one of three schedules of noncontingent reward, i.e., continuous reward (Group CRF), random reward on 50% of the trials (Group 50R), or no…

Provides additional data to explain the reverse effects of rewards on task performances for training problem-solving skills in fourth-graders. (RL)

Typical learned helplessness research has involved the presentation of non-contingent, aversive events followed by measures of performance on subsequent tasks; recent investigations have focused on the effect of non-contingent rewards. To examine the effects of non-contingent rewards on children, two studies were conducted, in which children were…