Presenting numbers/information to make mental calculations as efficient, pleasant or accurate as possible.

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13
votes
5answers
1k views

Display percentage increase/decrease as 110% or +10%?

Our interface is using a slider which allows users to alter a price from a preset recommended price. Alongside this we are showing the recommended price, the new altered price and, by request of the ...
13
votes
7answers
629 views

Greater Than > or Plus +

I want to convey a requirement that has a minimum but no maximum to my users. For instance 8. Which is more understandable? Participants: >8 or Participants: 8+ ? From layouts point of view >8 is ...
6
votes
4answers
293 views

Color-coding percentages, how should I interpret a result of 0/0 (as 0% or as 100%)?

I am making a report that requires me to display some calculations as a percentage. Basically, I'm doing a database query for records matching a specific ID. The number returned becomes my denominator ...
3
votes
3answers
222 views

Are mathematical symbols easier to understand than text?

I'm creating a dialog and presenting a list of mathematical comparison options to choose from. e.g. [attribute] [>] [value] I'm wondering if there's any research as to whether it's more intuitive to ...
2
votes
3answers
69 views

How can I summarize the contents of a mathematical matrix in a single text field?

Here's a question that pertains to UI design, but for an application geared at a more technical audience. In my application, users can assign an object properties of several types. These types ...
1
vote
0answers
68 views

What are best practices of algorithms for suggesting products in auto-suggest search pattern? [closed]

During my search for best practices for auto-suggest of products in e-commerce, I found good resources about the behavior of the search-and-result field, like Baymar, the book of P.Morville. Search ...
0
votes
2answers
39 views

Order of operations in custom expressions

In our system users can define behaviour based on condition expressions: {{shippingCosts}} + {{numBooks}} * {{bookPrice}} To most people this means (a + b) * c but to others this means a + (b * c). ...
0
votes
3answers
81 views

Probabilities: Fractional Odds, Decimal Odds or Percentages?

There are at least 3 ways to express the probability of an event occurring: fractional odds, e.g. '5-to-2' or '5/2' or '5:2', decimal odds, e.g. '2.5', and percentages, e.g. '29%'. In the UK, it ...
0
votes
1answer
38 views

Math 2D graphs: best way of graphically (black and white or using colors) representing overlapping curves

what's the best way to represent multiple 2D Cartesian-style graphs drawn in the same Caryesian plane and having zero or more possibly intersecting parts of intersection length 0 to open or closed k ...
0
votes
1answer
55 views

Displaying an input field for building lengthy equations

In the application I am designing, there is a requirement to allow the user to build an equation by hitting buttons, depicting operators and variables. This equation builder must be displayed within a ...