Through the Interface - a Human Activity Approach to User Interface Design

This dissertation discusses human-computer interaction, and the role of user interfaces in use and design from the point-of-view of human activity theory. Human-computer interaction conducted in purposeful human work is in focus. The main idea is that a computer application, from the user's perspective, is not something that the user operates on but something that the user operates through on other objects or subjects. The contents of the report is the following: Danish Summary; Introduction; Human Activity and Human-Computer Interaction; User Interface Design -- the Empirical Cases; User Interfaces; Methods for User Interface Design; User Interface Design -- Advice to the Designer.