The main purpose of the research reported in this document was to discover whether controlled experiments can be conducted on the relations between people and the complex computing systems which they use. Three increasingly complex experiments were designed to test the effect of varying delays of computer response on the number of commands issues…

A demand for more and better education has driven educators to seek the help of systems analysis in the process of decision making. Basic to the entire systems notion is the concept of a model, a simplified but controllable version of the real world. The systems approach, once the problem is defined, is to specify the subfunctions and…