Presented as part of the ’Visual display design’ course that I took at UBC by Professor Ron Rensink. Readings behind the presentation can be found at http://www2.psych.ubc.ca/~rensink/courses/psyc579/10-2.html
Citation preview
1.
Navigation of Information Spaces
Mohanr, Psyc 579, 6 Apr 2011
2.
Overview
Way finding 3. Landmarks 4. Navigation 5. Interaction
design
6.
Way finding
Three stages: 1. key landmarks 2. route from one location to
another 3. 2D cognitive spatial map * Order -depends
7.
Landmarks
Definition:
.distinctiveenvironmental features 8. . associated with
navigation actions
route = actions + landmarks Why do we need landmarks? . less
cognitive resources to navigate
9.
Landmarks
Functions of different kinds oflandmarks in virtual
environments
10.
Landmarks
Followtheroaduntilyougettothechurch,thenturnright.Thencontinuepasttwointersections.Youllsee
agasstationononesideoftheroadandabigappletreeontheother.Rightafterthat,make
yourfirstleft.Atthestopsign,turnleftagain.Illmeet youinfrontof the
house at the end of the road.
Paths Edges Districts Nodes Landmarks
11.
Landmarks
Followtheroad untilyougettothechurch
,thenturnright.Thencontinuepasttwointersections
.Youllseeagasstation ononesideoftheroad andabigappletree
ontheother.Rightafterthat,make yourfirstleft.Atthestopsign
,turnleftagain.Illmeet youinfrontof the houseat theend of the road
.
Paths Edges Districts Nodes Landmarks
12.
Landmarks
Difficulties: . due to multiple viewpoints . scaling error
13.
Landmarks
Design guidelines:
. a small number is visible at all times 14. . each visually
distinct from others 15. . use concrete and not abstract objects
16. . placed on major paths 17. . carry a common element
20. Navigation Definition: . creation and interpretation of an
internal model Four cognitive activities: . Browsing and modelling
. Interpretation . Strategy . Navigational process 21. Navigation
Browsing: Definition:registration of contentTypes:
Modelling: initiating the formation of an internal model 24.
Navigation Interpretation: . content registered from browsing
activity . integration into internal model . formation of an
internal model or cognitive map Interpreted in various ways: . no
more browsing is needed . current model is inadequate 25.
Navigation Browsing strategy: . planned . opportunistic Triggered:
. cognitively . perceptually 26. Navigation 27. Interaction design
To support browsing: . selection, encoding & presentation of
data . inherent data structure must be transformed into an imposed
structure . quick overview at a glance . low cost of interaction To
support modelling: . external representation should match the
inherent structure in data . topological structures representations
might be more effective Maintenance of internal model: . external
variations should be less disruptive . changing smoothly . show
only the relevant details 28. Interaction design
Richard Scarry's Busiest Neighbourhood Disc Ever
http://www.youtube.com/watch?v=xgqVv2ODVy0
29. Interaction design 30. Interaction design Navigation
metaphors: A good metaphor
is apt 31. matches the system well 32. easy to understand
A good Interface with right affordances
makes the possibility for action plain to the user 33. gives
feedback that is easy to interpret
Four different kinds:
world in hand 34. eyeball in hand 35. walking 36. flying
37. Interaction design World in hand 38. Interaction design
Eyeball in hand 39. Interaction design Walking 40. Interaction
design Flying 41. Interaction design Interaction:
affordances of the virtual data space 42. real physical space
43. input device 44. user's mental model of the task
Sense of control:
Principle of transparency
user is able to apply intellect directly to the task 45. the
tool itself seems to disappear
