Search (2 results, page 1 of 1)

  • × author_ss:"Marchionini, G."
  • × theme_ss:"Hypertext"
  • × type_ss:"a"
  1. Marchionini, G.; Liebscher, P.: Performance in electronic encyclopedias : implications for adaptive systems (1991) 0.00 
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    Abstract
    To make their system quickly usable, designers often build interfaces that reflect well-known manual activities. Demonstrates how undergraduates use their mental models for print encyclopedias to develop minimal proficiency with various electronic encyclopedias. Lower performance levels in the electronic systems are due to additional cognitive load required to adapt and develop mental models for the new systems. For the fact retrieval questions used in these relativley small data bases, the hypertext encyclopedia required less cognitive load than the 2 traditional Boolean-based systems. Adaptive designs that provide multiple system images are encouraged to support more comprehensive user understanding and more varied tasks
  2. Paez, L.B.; Silva-Fu, J.B.d.; Marchionini, G.: Disorientation in electronic environments : a study of hypertext and continuous zooming interfaces (1996) 0.00 
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    Abstract
    Explores the hypothesis that using a zooming graphical interface minimizes user disorientation when reading documents in an electronic environment. 36 graduate students at the University of Maryland at College Park, USA, were randomly assigned to read a hypertext document in either Pad++, a zooming graphical interface, or Mosaic, a jump-based interface. Questionnaires, observation, and taped interviews were used to compare and evalutae the use of the 2 interfaces with regard to learning time, performance and user satisfaction. Findings suggest as workstations become more powerful, a hybrid interface that adds continuous zooming to the existing mechanisms of scroll, pan and jump will emerge

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