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Title:

Attribute Gates

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Attribute Gates Ahmed Sulaiman & Patrick Olivier Culture Lab, Newcastle University, UK – PowerPoint PPT presentation

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Title: Attribute Gates


1
Attribute Gates
  • Ahmed Sulaiman Patrick Olivier
  • Culture Lab, Newcastle University, UK

2
The result
3
Tabletop education
4
Motivation tabletops
  • tabletop spaces
  • personal, public storage
  • each space has requirements
  • scale, orientation access rights
  • users often override defaults.
  • need lightweight techniques to change these
    attributes
  • need to take account of the size and shared
    nature of tabletops.

5
Principle activity theory
  • framework for thinking about physical
    co-located collaborative interaction
  • activity, action operation
  • novice to expert
  • carrying out more actions as operations
  • good interfaces move actions into operations
  • related to Buxtons notion of chunking
  • amount of problem performed automatically
  • glue subtasks together into larger task

6
Principle crossing
  • pen input
  • encourages a fluid stroke-based style
  • suited to crossing-based interfaces rather than
    point-and-click.
  • crossing-based interface
  • attribute usually represented by a thin
    rectangular area set by crossing
  • position attributes to allow a user to set
    multiple in one fluid stroke.

CrossY (UIST 2004)
FlowMenu (UIST 2000)
7
Principle targeting steering
  • Accot and Zhai extended Fitts law for steering
  • D distance
  • W width of channel
  • D/W index of difficulty
  • a b user dependent constants
  • seek to optimise the design of attribute gates
    for targeting and steering effort

8
Grid gates
9
Polar gates
10
Configuration grid gates
  • when steering dominates
  • when targeting dominates
  • w/h ratio in the range of 0.25-0.50

11
Configuration polar gates
  • steering
  • keep r0 small
  • w as big as possible
  • utilize all parts of the upper limb (Acot Zhai,
    2001)

12
Evaluation design
  • 8 pairs of users
  • receiver
  • sender
  • 3 conditions
  • context menu
  • grid gates
  • polar gates
  • measures
  • awareness
  • performance
  • preference

13
Results awareness
14
Results performance (participant)
15
Results performance (attribute)
16
Reflections
  • an appropriate technique for setting multiple
    attributes when moving between spaces
  • grounded in established principles of interaction
    design applied to the tabletop setting
  • user preferences were varied
  • significant number preferred contextual menus
  • other aspects of polar gates
  • top projection partially obscures attributes
  • gate memory (is it of genuine worth?)
  • physical metaphor helped steering behaviour
  • users found polar gates much easier to learn

17
Using attribute gates
18
Acknowledgements
  • Promethean Technology Limited
  • donating the multi-pen ActivBoards
  • Diwan Software (Dubai)
  • funding and employing Ahmed
  • Bedlington Community High School
  • organising studies (motivating work)
  • extended use of experimental applications
  • Reviewers for their detailed feedback

19
Thanks for listening
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