The recent technical literature abounds with a variety of studies documenting and analyzing the problems people encounter in learning to use contemporary computer equipment. This has been a major focus of the recent work in our laboratory (6, 9). The project such work must entrain is the development of design approaches to these problems. We have been and are developing alternate designs for training manuals and for in-system training (2, 4, 5, 7). This paper is a report of work in progress in this area. We describe a design approach to in-system training referred to as the Scenario Machine, and describe some initial results from an empirical learning study of four scenario machines.
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