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12

Your question is referring to display polarity. A positive polar display consists of dark letters on a light background, a negative polar display consists of light letters on a dark background. Polarity by itself is independent of text-to-background contrast, as you rightly state. Generally, positive polarity facilitates performance (e.g. Buchner & ...


8

Preface This is a very interesting question, that is also somewhat related to my area of research. I know of several related results (which I might add later in an edit), and I thought that with a few minutes of scholar search I'll find a paper dealing with this question exactly. I was surprised to find no such papers. So I decided to conduct an ...


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The Wikipedia article no longer makes reference to the phenomenon that you quote (to my inspection), so I'm not entirely sure if that assertion was edited out as an inaccuracy on someone's part. I did find some information on visual perception and high frequency flicker that might point to some of the significance of the 60 Hz refresh rate of a monitor. At ...


6

Depending on your exact definition of what you call a "context switch" there is some research available. There is plenty of research on a more high-level (multi-tasking) definition of context switches. Usually when I read about context switches they refer to this higher level concept, unlike the study you linked to which compares the cost of switching ...


5

I don't know of any well-validated general short scales. Here are a few thoughts: A major distinction is between self-report versus ability based measures. Self-report measures will ask the participant to rate their knowledge, skills, and experience. Ability based measures will require demonstration of competence. If you are limited to "self-measures", ...


3

It looks like there is some empirical evidence that passphrases are easier to remember than either random passwords (not surprising) or user-selected short passwords after standard advice to use mix of upper and lower and avoid words. http://homepages.cs.ncl.ac.uk/jeff.yan/#exp Thanks Jeff for the pointer in a comment (same Jeff?). J. Yan, A. ...


3

Because a majority of the people are just too plain stupid. In an international study by the OECD on adult competencies (PIAAC) that evaluated literacy, numeracy, and problem solving in technology-rich environments, it was found that only every third adult (in Germany: 36%) between 16 and 64 was able "to master more complex tasks such as navigating the ...


2

There is indeed some research on handedness and user interfaces but not exactly at the level you seem to be after. Handedness matters for tablet interfaces, hand occlusion is a particular concern there. Some references: http://hal.inria.fr/hal-00670516/en and http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.89.4546 Speculating myself a little bit, I ...


2

I have used ethnography for similar purposes several times. Structuring the interviews so that you are an apprentice and your subject plays the role of a master artisan works well. The book, "Contextual Design" by Beyer and Holtzblatt provides several modeling techniques for expressing the information in some ways that add significantly to essay. ...


2

Background on strategy selection We could categorise using tabs as a strategy for using a browser. There is a lot of research on the acquisition and use of strategies. My thesis (see repository page with pdf link) has an extensive literature review (see page 21 onwards). To quote myself: Another line of research has examined how people use computer ...


1

There is a lot of context to extract from this: For example if "using the X tool" requires a lot of time, it would be time-consuming to actually go by yourself and try for hours, when you could instead ask for help from someone who already has some knowledge of it. Also, people are all different, some people want to know how "things work in their ...


1

Charles Fletcher, one of my professors as an undergraduate, studies reading comprehension. He once mentioned a program called LiveInk, which he researches. This program is intended to improve comprehension for ordinary English, not programming language, but I don't see why it wouldn't work for programming language as well, to some extent at least. It ...


1

It is all about attention and reaction time: Information are coded in visual, aural and tactile channel. Here you have primer of visual coding. Visual coding could be signs or text. You have shorter time of reaction to primary colors (red yellow blue) and there is some kind of international standard which determine meaning of colors ( red-stop, green - ...



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