Searching for optimal methods of presenting dynamic text on different types of screens

Automatic dynamic presentation methods (e.g., vertical scrolling) are thought to be viable alternative means to present text on small-screen interfaces. Here we studied what is the most suitable method for different types of screens (for a laptop, a palm-type pocket computer, a communicator and a mobile phone). Reading rate and comprehension data suggest that there is an optimal screen type for each presentation method. The recommendations based on performance measures, however, differ from those based on usability and preference ratings.