ARTIST : a computer system for creating and running psychology experiments

A flexible computer system for research and teaching experiments in psychology is described. Special features of the system include {1} separate phases for the generation and running of experiments, !2} facilities to control presentation of stimuli according to any factorial design, and {3} different modes of operation depending on the prior knowledge of the users. The system is evaluated both in terms of the range of experiments that can be performed and in terms of the time and effort required to create new experiments or modify old ones. General principles for designing interactive systems are discussed in the light of experiences with this particular system.