Interfacing thought: cognitive aspects of human-computer interaction
Man-computer interfaces: an introduction to software design and implementation
Man-computer interfaces: an introduction to software design and implementation
Modern structured analysis
Designing the user interface (2nd ed.): strategies for effective human-computer interaction
Designing the user interface (2nd ed.): strategies for effective human-computer interaction
Object-oriented modeling and design
Object-oriented modeling and design
A GOMS analysis of a graphic machine-paced, highly interactive task
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The precis of Project Ernestine or an overview of a validation of GOMS
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Comparison of empirical testing and walkthrough methods in user interface evaluation
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Analysing system-user cooperation in KADS
Knowledge Acquisition - Special issue on the KADS approach to knowledge engineering
What is gained and lost when using evaluation methods other than empirical testing
HCI'92 Proceedings of the conference on People and computers VII
The Psychology of Human-Computer Interaction
The Psychology of Human-Computer Interaction
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Aiding functions may be added to a computer system, so that users with insufficient knowledge can perform their tasks. The aiding should be integrated into the task execution of such users. Empirical knowledge is lacking about the conditions for successful aiding. We evaluated the on-line help system of the statistical software package SPSS/PC. It appears that the addition of help facilities to the system worsens the task performance and learning of novices substantially. In our view, the addition of help is harmful, because communication with the system is more complex as a result, whereas the help hardly provides the task support that novices need.De Greef et al. [5] provide two design principles that result in consistent communication and aiding in correspondence with users' needs: (i) the design of aiding functions is an integrated part of interface design and (ii) aiding is based upon an expert model of the users' task. We evaluated an interface for the statistical program HOMALS, which was designed according to these principles. As a consequence of the addition of aiding functions, non-expert users perform their tasks better and learn more.