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- QUESTION 1 (20p)
- ==========================
- 3D Fuckedup chart to comment on.
- QUESTION 2 (18p)
- ==========================
- Describe and discuss ________ including any limitations. Use sketches to illustrate your answer.
- Subjects:
- - Gestalt principles
- - Retinal variables
- QUESTION 3 (12p)
- ==========================
- Describe and critically compare two ________. Consider the pros and cons as well as issues for both.
- Subjects:
- - Visualising time (!)
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- ::QUESTION 1::
- - Data and encodings used:
- what are they actually trying to communicate?
- about X and Y axis
- encodings mean mapping a data attribute to a visual variable
- visualisation depends on:
- type of data being viewed
- the question we want to ask/answer
- - Wrong layout/chart type
- size
- type
- - information is obscured
- - 3D
- makes data difficult to interpret
- colour changes on 3d effect not data
- - Use of colour
- colour1 vs colour2 together
- background colour
- ease to read
- - Labelling unclear:
- naming on categories confusing or mixed cats
- title
- size
- COLOUR, SIZE, TYPE, LABELLING, 3D/PIE
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- ::QUESTION 2::GESTALT LAWS
- - Lo proximity: objects that are near to each other tend to be grouped together.
- > make sure items are clearly perceptually grouped.
- - Lo similarity: the hooman i tends to perceive similar elements in a design as a complete picture/shape/group even if those elements are separated.
- > can be used to strengthen grouping in UI elements
- > Ensure different functions are differentiated and consistently styled (ie links, buttons)
- - Closure: we tend to group objs together if they appear to form a boundary.
- > Add borders around elements to create perceptual separation
- > Lo Common Region can be implied using Law of Closure
- ____________ __ __
- | O | | |
- | O O | O
- |____________| O |__ __|
- - Continuity: foreground background
- - Common fate: if objs appear to be moving in the same direction they will be group together
- _\|/_
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- ::QUESTION 2::RETINAL VARIABLES
- - Size: - vs --- OR o vs O
- hoomans are better at perceiving differences in length than in area
- - Value or lightness: how black gray or white something is in comparison to another.
- - Texture: dots, squares, lines, shading, etc.
- easy for hoomans
- - Orientation: / | \ _
- why pie charts are more difficult to understand than barcharts
- - Shape: star, square, triangle, etc.
- the more they increase the more difficult it is (3 vs 4 is fine but 25 vs 29 not)
- - Colour: incredibly complex phenomenon. Screen vs printer. Density, saturation and hue
- easy to make mistakes -> solution is colorbrewer2 (3: sequential, diverging or qualitative)
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- ::QUESTION 3::VISUALISING TIME
- Timeslices:
- - Animation
- + Good use of screen space
- + TRANSITIONS are quite clear
- - Bad for ANALYSIS
- - Perception of MOTION may not be accurate
- - Can't be printed
- - Interaction
- + Good use of screen space
- + More FUN than animation
- + Good to SPOT changes
- - Quite COGNITIVELY taxing (store in memory)
- - Can't be printed
- - Juxtaposition
- + Good to spot changes
- + Not cognitively taxing
- + Can be printed
- - The more the smaller
- #
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