Selected Public Appearances
Current Work (Selection)
  VOICE Award 2006
  Project HALO 2
  Mobile Multimodal Systems
Recent Work (Selection)
  VOICE Award 2005
  Improved Internet Search
  Document Manager
  Multitasking with Xybernaut
  Automatic Hyperlinking
  Speech-Based Home Cooking Assistant
  Sonicson Music Retrieval System
  Tips and Tricks for Mobile Eye Tracking
Selected Videos
Services and Contact

German Competence Center for Speech Technology The other parts of the German Competence Center for Speech Technology:
Virtual Information Center LT-World
German Demonstration Center for LT-Systems

The COLLATE Project

Last modified: 2006-11-08

The DFKI Evaluation Center for Language Technology


Recent Work


Automatic Hyperlinking

Screenshot Automatic Hyperlinking Screenshot with eye movements
  • Questions:
    • How should hyperlinks be marked in text?
    • Trade-off between distraction and link awareness
    • Increased relevance of link redundancy
    • Which occurrences of a term should be hyperlinked?
      • All occurrences – too distracting?
      • Linguistic selection criteria?
      • Which occurrences do users actually use?
    • Trade-off between distraction and accessibility of linked information
  • Results:
    • Users tend to use one of the initial occurrences of a link even if they do not read the text linearly
    • Problems caused by adjacent full form and abbreviation of same concept
      • E.g. „Gesellschaft bürgerlichen Rechts (GbR)“
      • Link intuitiveness – cognitive overhead
    • Users do fix hyperlinks they do not follow
    • Some users still complained links hard to find
    • Repetition of information in text and hyperlinks viewed as negative
    • Users were annoyed by hyperlinks containing little information
  • Study performed with the ASL Model 504 remote eye tracker
  • Screenshot of the text used (click on the picture to enlarge it)
    Screenshot Automatic Hyperlinking
  • Fixplots (click on the picture to enlarge it)
    Screenshot with eye movements 1 Screenshot with eye movements 2 Screenshot with eye movements 3
    Screenshot with eye movements 4 Screenshot with eye movements 5 Screenshot with eye movements 6
    The red lines correspond to the user's line of gaze, the red dots to the fixations: the longer the fixation, the bigger the dot. The fixations are numbered (number next to the fixation) and start with "1".