IAT 355 Study Guide - Final Guide: Treemapping, Visual Analytics, Idiom
29 Apr 2015
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Colin ware suggests that one should use a limited number of colors to represent qualities in a visualization. Explain what perceptual factors lead to this suggested limit. Visual distinctness - hues should be unique enough so that you can tell them apart. Learnability - different colors stand for different entities. 5-6 distinct values simultaneously (up to 9 under controlled conditions) 20 for reasonably sized stimuli (more under controlled conditions, usually need legend) Compare the separability/integrality of color, location on a scale, and orientation. Be sure to combine each of these combos: color(red)+color(blue), color+location, color+orientation, location+orientation, location(x) + location(y). Identify, compare and contrast two common techniques for visualizing multivariate data. For each technique, identify the strengths and weaknesses in terms of the following basic visualization tasks: A correlation exists between two variables when one of them is related to the other in some way. Strength: can display more points and remain readable before requiring interaction.
