HUMAN-COMPUTER INTERACTION
SECOND EDITION
An evaluator's guide to using the cooperative evaluation approach successfully.
Reviews the major evaluation techniques.
Describes the revised version of the cognitive walkthrough method of evaluation.
Covers the heuristic evaluation method in detail.
Includes material on both cognitive walkthrough and heuristic evaluation.
The third approach to providing the system with a model of the user, and the one used in adaptive help systems, is to have the system construct and maintain a model of the user based on data gleaned from monitoring the user's interaction. This model can then be consulted when required. This automatic approach to user modelling also has the problem of the setup time required, during which time the user has a default system, but the onus to build the model is taken away from the user. Various suggestions have been made as to how to deal with the setup time, including getting the user to choose an initial default model, and building a model based on pre-use activity, such as game playing. The former is problematic in that again it makes the user decide on a model at a time when he may not have sufficient experience to do so effectively. The latter may not produce a model which is transferable to the actual domain. The most common approach is still to provide a basic start-up default model and concentrate on rapidly updating this for the actual user. The default model may be based on experimental or observational results gleaned in evaluation.
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