The performance of five students (ages 6 to 10) in an adjustment class for deaf children was compared under fixed and variable ratio schedules of reinforcement. During the VR condition, students visually attended more and engaged in disruptive behavior less often than during the FR condition. (Author)

Five experiments were conducted to determine whether properties inherent in some training procedures may subtly influence the adaptability of skilled performance of complex tasks. The first two experiments assessed the insensitivity of low-rate performances. Examined in the third experiment was the issue of whether instructions that focus…