Proceedings: GI 2003

Less-Tap: A Fast and Easy-to-Learn Text Input Technique for Phones

Andriy Pavlovych, Wolfgang Stuerzlinger

Proceedings of Graphics Interface 2003: Halifax, Nova Scotia, Canada, 11 - 13 June 2003, 97-104

DOI 10.20380/GI2003.12

  • BibTeX

     title = {Less-Tap: A Fast and Easy-to-Learn Text Input Technique for Phones},
     author = {Andriy Pavlovych and Wolfgang Stuerzlinger},
     booktitle = {Proceedings of the Graphics Interface 2003 Conference, June 11-13, 2003, Halifax, Nova Scotia, Canada},
     organization = {CIPS, Canadian Human-Computer Communication Society},
     publisher = {Canadian Human-Computer Communications Society and A K Peters Ltd.},
     issn = {0713-5424},
     isbn = {1-56881-207-8},
     location = {Halifax, Nova Scotia},
     url = {},
     year = {2003},
     month = {June},
     pages = {97--104}


Transparency can be used to increase the visibility of a user's workspace in situations where the space is obscured by floating windows and tool palettes. Dynamic transparency takes this approach further by making components more transparent when the user's cursor is far away. However, dynamic transparency may make palettes and floating windows more difficult to target. We carried out a study to test the effects of different types of dynamic transparency on targeting performance. We found that although targeting time does increase as targets become more transparent, the increases are small - often less than ten percent. Our study suggests reasonable maximum, minimum, and default transparency levels for designers of dynamic transparency schemes.