O fenômeno da desorientação em hipertexto: uma solução alternativa através de zoom contínuo.

Abstract

This Thesis investigates the efficacy of Continuous Zooming as a new interface mechanism for working with electronic text in general, and minimizing disorientation effects in particular. Three experiments were conducted by comparing variations of jump and zoom interfaces for textual material segmented into different levels of detail ranging from title and section headings to full text detials. The first experiment compared user performance (text comprehension and task completion time), perceived disorientation, and satisfaction for 36 subjects across the two interface conditions. Subjects were able to quickly learn to use the zooming mechanism and reported high levels of satisfaction in interviews. In the second experiment, a third, hybrid jump and zoom condition was also included and spatial abilities of the 15 subjects were taken into consideration. These studies investigated advantages of continuous zooming such as ease of gaining an overall macro view of a text and personal control of text size, as well as new interface challenges and design parameters such as zoom speed control and font size ratios across different levels of text representation. In the third user study five font ratio variations across three levels of text representation (title and section heading, key sentence for each paragraph, and the remaining texts) were compared. These studies investigate the efficacy of continuous zooming as a new display control mechanism for text browsing and reading.