01756naa a2200193 a 450000100080000000500110000800800410001902400550006010000140011524501010012926000090023052011170023965300100135665300290136665300410139565300280143670000170146477300810148110067982019-04-02       1990    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/S0020-7373(05)80067-72DOI1 aHOWES, A.  aDisplay-based competencebtowards user models for menu-driven interfaces.h[electronic resource]  c1990  aThis paper discusses the critical role played by aspects of the display in the use of many computer systems especially those driven by menus. We outline a formal model of ?display-based competence? by extending the Task-Action Grammar notation (Payne & Green, 1986). The model, D-TAG (for display-oriented task-action grammar) is illustrated with examples for the well-known Macintosh desk-top interface, and from a more deeply-nested menu interface to a device used for the remote testing of telephone line (RATES). D-TAG exploits two extensions of TAG to address important aspects of interface consistency. The most important extension uses a featural description of the display to capture the role of the display in structuring task-action mappings; the second describes the ?side-effects? of a task, i.e. those effects not described by the semantic attributes of a task. By embedding these extensions within the organizing framework of TAG's feature-grammar, we are able to develop descriptions of interfaces which highlight aspects of (display) design that are outside the scope of other formal user models.  aD-TAG  aDisplay-based competence  aDisplay-oriented task-action grammar  aSistemas computacionais1 aPAYNE, S. J.  tInternational Journal of Man-Machine Studiesgv. 33, n. 6, p. 637-655, 1990.