The author of the paper concentrates on the basic principles of graphical perception rather than laying out principles on how to draw a graph or compare different graphs. The author does not include color, texture and hue as elementary perceptual tasks, but in many visualizations color combined with hue and texture play an important role where the visualization may not be perceived by the user as outlined by the author based the priority of elementary tasks, but an outstanding color and hue difference can be dominating.
Based on the experimental results, the author suggests placing elementary perspective tasks at the top of hierarchy and proposes different forms of enhancements for existing data. But, when we see the framed rectangle charts, the intensity of something can be conveyed in a better fashion using shaded charts like the murder rate. So, these may be useful while performing a more detailed quantitative analysis, but not for conveying the basic information to the user. The theory of ordering elementary perceptual tasks can convey good quantitative information fast and if they are used with conjunction with other forms at a higher level produce better visualizations in my opinion.
Based on the experimental results, the author suggests placing elementary perspective tasks at the top of hierarchy and proposes different forms of enhancements for existing data. But, when we see the framed rectangle charts, the intensity of something can be conveyed in a better fashion using shaded charts like the murder rate. So, these may be useful while performing a more detailed quantitative analysis, but not for conveying the basic information to the user. The theory of ordering elementary perceptual tasks can convey good quantitative information fast and if they are used with conjunction with other forms at a higher level produce better visualizations in my opinion.
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