Decision-making processes were investigated in a laboratory analogue of clinical diagnosis and through computer simulations of decision making. The data indicated that nonprobabilistic theories can provide plausible and complete accounts of decision behavior and can improve quantitative accuracy of predictions that are based on traditional…

The School of Education at the University of Exeter (England) is developing a curriculum project in which secondary school students learn history by using prepared computer programs, by using the computer as an electronic blackboard, and by doing their own programing. The Exeter project is described. (RM)