Ricardo Jota

Publications (2)0 Total impact

• Source

  Available from: Joaquim Armando Jorge

  Conference Proceeding: The Continuous Interaction Space: Interaction Techniques Unifying Touch and Gesture on and above a Digital Surface.

  Nicolai Marquardt, Ricardo Jota, Saul Greenberg, Joaquim A. Jorge
  Human-Computer Interaction - INTERACT 2011 - 13th IFIP TC 13 International Conference, Lisbon, Portugal, September 5-9, 2011, Proceedings, Part III; 01/2011
• Source

  Available from: Miguel Nacenta

  Conference Proceeding: A comparison of ray pointing techniques for very large displays

  Ricardo Jota, Miguel Nacenta, Joaquim Jorge, Sheelagh Carpendale, Saul Greenberg
  [show abstract] [hide abstract]
  ABSTRACT: Ray-pointing techniques are often advocated as a way for people to interact with very large displays from several meters away. We are interested in two factors that can affect ray pointing: the particular technique's control type, and parallax. Consequently, we tested four ray pointing variants on a wall display that covers a large part of the user's field of view. Tasks included horizontal and vertical targeting, and tracing. Our results show that (a) techniques based on 'rotational control' perform better for targeting tasks, and (b) techniques with low parallax are best for tracing tasks. We also show that a Fitts's law analysis based on angles (as opposed to linear distances) better approximates people's ray pointing performance.
  Proceedings of Graphics Interface 2010, Ottawa, Ontario, Canada; 01/2010