Eleven British students (ages 16-19) with severe learning difficulties were presented with microcomputer switches which activated various visual and auditory contingencies. Students were able to indicate a preference for specific contingencies when placed in a carefully designed situation. Visual rewards did not generate strong preferences. (JDD)

Effectiveness of two versions of computer software used as an electronic blackboard to present geometric concepts to ninth grade students was compared. The experimental version incorporated color, animation, and nonverbal sounds as stimuli; the no-stimulus version was monochrome. Both immediate and delayed learning were significantly better for…