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Dec
18
comment Conducting different tests on a website at once
The question about attributing a sale to all pages in a session is a common problem for conversion attribution. For example, a site may have both a 'Free Shipping for Orders over $25' promotion and a '10% off all shoes' promotion. When a visitor sees both promotions and purchases more than $25 worth of shoes, is the purchased considered a conversion for both the Free Shipping promotion and the 10% promotion? Every business has a different answer to this question. Here is Google's explanation of attribution modeling in Google Analytics.
Nov
26
comment Did the default positions of OK and Cancel CHANGE in Windows or web browsers?
The OK button has been on the left or on the top as far back as Windows 2.0.
Nov
21
comment Flashing messages and cognition, how effective are they over non flashing messages?
There has been research in the area of automobile turn signals. Given the reliance on knobs, dials, and lights in early HMI, flashing displays were of interest to system designers and researchers from the beginning. This research is the basis for the SAE J1690 standard for turn signals of 60 to 120 flashes per minute and 30 to 75% on time.
Nov
21
comment Flashing messages and cognition, how effective are they over non flashing messages?
This is a Big Question - Part II: Questions about memory could include: Is memory for an event that was preceded by a flashing message more accurate? more durable? less susceptible to interference? Questions about attention could include: does a flashing message interfere with primary task performance? secondary task performance? performance on verbal tasks? manual tasks? spatial tasks? Narrowing the question might make getting an answer easier.
Nov
21
comment Flashing messages and cognition, how effective are they over non flashing messages?
This is a Big Question - Part I: There are many research studies on the effect of flashing displays and guidelines based on the research in the context of flash rate of emergency vehicle lighting, crash avoidance systems, air traffic control displays, railroad crossing signals, etc.
Nov
21
comment Why are normal water coolers so low?
Also, 5 gallons of water weighs approximately 41 pounds. A taller cooler requires a more substantial structure beneath it to keep the top-heavy cooler stable. In the United States, there are ADA requirements for water cooler height.
Nov
20
comment Is there a definitive answer to the line length readability question in the context of programming code
This research suggests readability is determined by more than line length and type size. I'm assuming this questions is using 'legibility' as a synonym for 'readability'.
Nov
18
comment User acceptance of suggestions from decision-support system
In the human factors literature, you would search for 'trust, and 'automation'. This is a survey of the existing research as of 2004. This is a much shorter survey from 2010. This is 2013 view of this topic from AI researchers.
Nov
17
comment numbers on a credit card expiry date year form
A previous Stack Overflow question about maximum expiration date. Also, most cards are reissued within 3 years because (1) the magnetic strip wears out, and (2) credit card companies have determined this is a reasonable balance between convenience and security against fraud.
Nov
15
comment Behavior of close button and X
For reference: Windows guidelines for the close button in the title bar Apple's too. Look in the Windows Components section.
Sep
12
comment OR & AND representations for the non technical user
I completely agree with 'Any' and 'All' instead of AND and OR. In my experience, indentation works much better than brackets. Indentation limits the available space as terms become more nested but it is unlikely anybody will create a query with terms nested 3 deep. Most people do not understand a query that complex nor would they create one. More than likely, they will create a more shallow query with redundant terms.
Sep
12
comment OR & AND representations for the non technical user
Only use AND and OR if the targeted user group knows Boolean logic. Otherwise avoid those terms. There is a body of research on this problem showing most people misinterpret the function of AND and OR in queries. See this paper as an example of this research. Having worked on this problem for many years, we've chosen a variation Danny's. In ours the user chooses Match All or Match Any before specifying the variables, operators, and values. Match All = AND Match Any = OR This works better than any AND and OR UI we've tried without a doubt.
Sep
10
comment Optimal shape for interaction with a map
The answer depends on whether the task is 'finding a route' or 'finding a route and navigating along the route from the origin to the destination'. If the task includes navigation, then the mode of movement is also relevant. The research on electronic map displays for aviation, automobiles, and pedestrian overlaps somewhat but not completely. The differences depend on whether you want to emphasize an ego-centered reference frame, world-centered reference frame, or both. Can you describe the task in more detail?
Sep
6
comment Comparison of charts: side-by-side vs. top-to-bottom
As Aryan Vijay implies below, the answer to your question depends on the type of chart, the data, and the type of comparison. Can you be more specific about any of these three factors? Also, search for 'trellis chart', 'scatterplot matrix', or 'small multiples' to see standard ways of arranging charts for comparison across charts.
Sep
3
comment Which way should a dial turn using the arrow keys?
You are working on a problem known in human factors as a 'population stereotype'. There are several principles involved. See this slide deck for a summary. As with any population stereotype, the definition of 'population' affects the expected movement of the dial in response to the control affecting the dial. On UX Stack Exchange, you are likely to get people saying 'clockwise' and others saying 'counter/anti clockwise.' Ignore all of them. Implement both methods and test it with prospective users.
Aug
28
comment Desktop metaphor - Why is it called “windows”?
While Microsoft's Windows may have popularized the term, the creators of Smalltalk used 'window' to describe...umm...a window several years before Microsoft's first release of Windows. Search for 'window' in this Smalltalk 72 user's guide. Most likely, they were influenced by NLS which had windows.
Aug
23
comment How much value does Human factor's CUA certification hold for a Senior web developer?
This question has been asked in different forms previously. Search for CUA and take a look at the top questions.
Aug
21
comment Is email field assistance still necessary?
Are you asking whether client-side validation should check that the email field entry's format is local-part@domain or are you asking whether the standard practice of requiring entry of the email address twice is still necessary? Both are forms of client-side validation but serve different purposes. The first validates data format. The second validates the user's intent, i.e., to provide an authentic or bogus email address.
Aug
21
comment Designing a password/authentication system usable for young children in a classroom
It looks like a version of Correct Horse Battery Staple. See XKCD and this discussion for some insight into this 4-part password.
Aug
21
comment Changing a visual object as it is dragged
Do you mean something like this or like a video editing UI? With the difference being the map holds the objects rather than a list or table.