A Case Study on Applying Extended Task-Action Grammar (ETAG) to the Design of a Human-Computer Interface (original) (raw)
1992, Zeitschrift für Psychology 200, 2, 1992, 135-156
In this paper Extended Task Action Grammar (ETAG; Tauber, 1988, 1990) is applied, as a formal method to represent the knowledge a competent user has about the structure of a user interface. This paper consists of three parts. First, ETAG itself will be discussed, including a brief treatment of the considerations underlying its development and the purposes of ETAG, an explanation of what an ETAG description consists of, and some remarks about the similarities and differences between ETAG and other formal models. Secondly, the models are represented which resulted from applying ETAG to the design problems formulated in the Macinter modelling contest (MacInter 1990), supplemented with remarks about specific problems and choices taken. This part will be directed at both evaluating the design alternatives of the contest and a preliminary evaluation of ETAG as a design model. Finally, using the results of the previous section, the general problems, possibilities and shortcomings that were encountered in applying ETAG will be discussed in an attempt to formulate requirements for the future development of the method.
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