Usability of the digital library: An evaluation model.
The main research goal of this dissertation is to develop a model and a suite of instruments to evaluate the usability of academic digital libraries. Usability in this study was examined from the perspectives of effectiveness, efficiency, satisfaction, and learnability. The model that was developed considers both quantifying elements such as accuracy rate, time, and number of steps required to complete a task, and the subjective criterion, satisfaction, which is further broken down into the areas of ease of use, organization of information, terminology and labeling, visual appearance, content, and mistake recovery. The model was tested at two academic digital libraries. It is a cross-institutional usability study. The study recruited a total of forty-one subjects and was divided into two stages to confirm findings.