(GazeHawk intern here.) That's definitely a good approach if you presuppose the existence/obviousness of distinct page elements, which is a whole beast in and o

(GazeHawk intern here.) That's definitely a good approach if you presuppose the existence/obviousness of distinct page elements, which is a whole beast in and of itself. Right now we allow our customers to define "Areas of Interest" in our reporting system, and we immediately display statistics like average user time on area, average rank of area (ie how many other areas, on average, did users look at first) and so forth. However, it's unclear to me how to represent these numbers in a visually intuitive way in the case where there are 50 distinct areas. One possibility we're exploring is coloring different areas with different intensities based on some index composed of these features. However, it's not clear what the right formula for this index is, or if it's the same in all situations.