A generic approach to supporting diagram differencing and merging for collaborative design
Proceedings of the 20th IEEE/ACM international Conference on Automated software engineering
Visual languages for event integration specification
Proceedings of the 28th international conference on Software engineering
A visual language and environment for specifying user interface event handling in design tools
AUIC '07 Proceedings of the eight Australasian conference on User interface - Volume 64
Visual Modelling of Complex Business Processes with Trees, Overlays and Distortion-based Displays
VLHCC '07 Proceedings of the IEEE Symposium on Visual Languages and Human-Centric Computing
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Visual programming languages aim to promote usability, but are rarely examined for it. One reason is the difficulty of designing successful experimental evaluations. We propose the Cognitive Walkthrough as an aid to improve experimental designs. This is a novel application of an HCI-derived technique designed for evaluating interfaces rather than experiments. The technique focuses on the potential difficulties of novice users and is therefore particularly suited for evaluating the programming situation, which is knowledge-based and non-routine. We describe an empirical study performed without benefit of a walkthrough and show how the study was improved by a series of walkthroughs. We found the method to be quick to use, effective at improving the experimental design, and usable by non-specialists.