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Post by mmadaio on Apr 12, 2016 13:50:17 GMT
To Judy's point, it might be the case that seeing the world in metaphors is a top-down process, while simile and analogy-building happen from the bottom-up. I look at something like "I should have been a pair of ragged claws, scuttling across the floors of silent seas," or "The apparition of these faces in the crowd; petals on a wet, black bough." and that seems to be a top-down, gestalt transformation or mapping of one complex concept to another, rather than the bottom-up feature selection and matching of similes like "Apollo came down like the night". But I'd like to discuss this more.
Regarding the "Just noticeable difference", as a former percussion instructor, I would regularly listen and offer feedback to students on the timing of their playing, and would need to give meaningful feedback about very slight differences, such as between 18 notes per second (sextuplets at 180bpm) and 21 notes per second. This was (obviously) very difficult when I was just starting, and it's just sort of assumed in that community that everyone can and should be able to notice these differences. This chapter focused much more on visual than auditory, but I'd be interested to see what the Weber function looks like for timing of sounds.
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Post by judithodili on Apr 12, 2016 15:21:24 GMT
The issue of top-down vs bottom-up is interesting... I'm not quite sure that they are mutually exclusive. For example, when I look at stimuli, automatically I start to associate it with things that I already know. When that fails, then I start to do the bottom-up approach of trying to put it together.
Maybe some people are more likely to exercise one or the other... When I go to museums and look at abstract art, I can never "see" anything. Some other people can see those same pieces and bring up all these different meanings that I cannot see. So, there may be a different cognitive process or a certain disposition towards top-down vs bottom up depending on person's natural creative ability.
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Post by anhong on Apr 18, 2016 2:22:57 GMT
What are the implications of a "just noticeable difference" on the design of interactive systems? Any interesting connections to your research?
In HCI sensing techniques, his relates a lot with the resolution of input and output. The screen resolution can increase, but will be irrelevant if our eyes cannot perceive the difference. The buttons can be small, but will be irrelevant if our fingers can not shrink down to the size to click on it. So understanding human capabilities can inform the design and technical approaches we take in sensing.
Another area related to my research is sonification techniques for blind people. Similar to icons, earcons are symbols using sound to deliver information, such as an app, an action, a trend, etc, using pitch, volume, time, location, etc. Understanding human capability in differentiating sound locations, or pitches, also in different context, will be useful for using them to deliver information to blind people. Also, many blind people have a higher sensitivity of hearing than sighted people, so tailoring the app's sensitivity to them can also enhance the functionalities.
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