Abstract
System design tasks can be solved using instructions and data items at various levels of detail (levels of abstraction) ranging from binary code to application level instructions. The research presented here explores the effects of providing a designer with varying levels of detail about system implementation on the quality of a resulting human‐interface design. First, a model of the relationship between knowledge of lower levels of abstraction and design quality is described. Next the results of an experiment (involving the design of a human‐computer interface) which examines some aspects of this model are presented. Finally, the relevance and implications of the results are discussed.
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