In 2 separate longitudinal studies, infants and their mothers were seen in 3 longitudinal visits. At 2 months, they were observed in free play where mothers' contingency toward their infants was obtained. At 5 months, a goal blockage response was produced when a previously learned contingent response became ineffective in producing an interesting…

The contingency intervention system based upon an Apple II microcomputer is described and its application to three Down's syndrome infants and one premature infant is discussed. The use of the microcomputer as a behavioral microscope in infant intervention is examined. (Author/CL)

Patterns of learning by five infants with Down's syndrome (3.5 to 12.5 months old) were studied. The children were visited at home 2 to 3 times per week for periods ranging from 1 to 8 months. Two of the children were reinforced for pulling a string attached around their wrist. Consequences included tape recordings of music or their mother's…

Two experiments examined how different frustration contexts affect the instrumental and emotional responses of 4- to 5-month-olds. Both experiments showed that arm responses increased when the contingent stimulus was lost or reduced but decreased when control of the stimulus was lost under noncontingency. Facial expressions of anger, but not…

A home-based, computer-monitored contingency intervention program was developed to provide a source of cognitive and motivational stimulation to infants with handicaps. Equipment includes a computer, contingency interface, software, adaptive toys, switches, and a mounting panel. Learning was exhibited by 19 of 20 infants, and parental response was…