“That which we will call a…” Hey, just what are we going to call it?

Nomenclature, terminology, labels. What we call things and the names we use are very important, and deciding upon the “perfect label” can often be more difficult than we anticipate. As information designers and architects we are tasked with not only organizing information, but also often with naming it.

Sometimes the exercise is quite straightforward: developing a product catalog for an online toy store may be more an exercise in deciding whether building blocks are categorized as “puzzles” or ” learning toys” than in naming them “building blocks.” In either case, the label for the toy seems obvious. After all, we would not change the name from “building blocks” to “plastic construction units.”

But sometimes the nomenclature exercise is not as easy or straightforward. Sometimes we struggle with what to call something, especially when we are trying to decide upon a site’s navigation and interaction terminology, headers, subheaders, text links, and buttons. For example, should we call a section “Online Learning Center”, “Training Services”, or “Guides and Documentation”? Although each of these options conveys a similar type of content, each creates slightly different expectations about what information will be presented, the format of the information, and the extent and form of the interactions possible.

The labels and terms we use are very important, because they assist, guide, and inform visitors to our site (or users of our applications) and help them work efficiently and accurately. Poor nomenclature:

• is ambiguous, incomplete, or even erroneous.
• causes confusion.
• causes frustration.
• increases abandonment.
• decreases credibility and trust.

Good nomenclature should go unnoticed, because site visitors do not have to stop and think, “What does this mean?”, “Where will this take me?”, or “What is going to happen?”, because it is immediately obvious and meaningful to them. There are a few practices we can put in place to help us develop better labels and more useful (and usable!) nomenclature:

1. Use active language (e.g., “See the Ford Model T Specifications”) and avoid passive language (e.g., “More about the Ford Model T may be found here.”)
2. Use familiar terms that are meaningful to the target audience, and try to avoid internal, (company or product specific) terminology (e.g., “Mental Health” rather than “Psychopathology” on a community health web site.)
3. Use directive language that sets accurate expectations for the reader about what will happen and what will be presented when they follow the link or press the button (e.g., “Download the Update” communicates that the download will begin right away, whereas “Get the Update Here” is somewhat vague and may either start the download or take the visitor to another page.)
4. Be concise. Long labels are more likely to introduce ambiguity, and there is almost always limited screen real estate to work with. Tooltips that show up on mouseover are a nice way to include additional, explanatory information if necessary. Also, eliminate any unnecessary words, for example, use “Read the full article” instead of “Click here to read the full article.” There is no need to write “Click here to…” as long as the link looks like a link to the visitor. If it does not look like a link, then make it look like one – do not fix it by adding “Click here.”
5. Be consistent. The terminology, tone and voice, and grammatical structure should be parallel across the navigation system. If you are using active verbs in the navigation, then all of the navigation options should include them (e.g., “Search for Music”, “Listen to Music”, “Share Music”, and “Buy Music.”)

A recent blog post on MSDN discussing the usability process behind the new Microsoft Office 12 “ribbon” used to present function icons in the interface described how they learned from observation that users could scan the icons more quickly when the icons are not all the same size. But not everyone thinks (based on their intuition) that different sized icons are a good idea.

I (Jensen Harris, the blog author) was reading a blog entry of someone who was kind of critical and dismissive about what we’re doing and our designs. One of his criticisms was “how bad the usability of the Ribbon would be because it’s got icons scattered all over of various sizes.” What we’ve learned is actually the opposite. People can scan disparate patterns more easily than homogenous patterns. When we use more toolbar-like layouts–a bunch of equally-spaced, equally-sized buttons, people scan them less quickly than when each chunk has a memorable layout. So we actually try explicitly to vary the layouts between chunks–it helps people find the thing they’re looking for more quickly.

This is a great example of how we are re-discovering some basic perceptual principles that have been studied psychologists for nearly 100 years: humans (and all insects and animals, for that matter) are designed to perceive change. We notice more quickly when things are different or when they change, and we get perceptually “bored” when things are all the same and never (or rarely) change. We know from software design experience that rows and rows or columns and columns of the same icon in file management UIs offer no scanning advantage, but if just one of those icons differs it seems to literally jump off the page at us. We notice the difference.

It is possible for historical reasons that function icons in toolbars are the same size because is it easier to design and build a toolbar where everything fits together like uniform bricks. It’s more difficult to create a toolbar where all of the pieces are different sizes and must be properly arranged in order to “look right.” Perhaps we have a perceived need for a grid-based system because it is simpler, not because it is better.

Yes, icons do vary in color and content based on the function, so there are differences among the icons already, but a standard icon size introduces a regularity that makes it more difficult to see those differences. Reading researchers have known for a long time that we read LONGER TEXT PASSAGES WRITTEN IN ALL CAPS MORE SLOWLY THAN WE READ PASSAGES WRITTEN WITH BOTH UPPER AND LOWER CASE LETTERS, because the ascenders and descenders provide us with word patterns based on the differences among the letters that we recognize more quickly. All caps letters are uniform rectangles, but a mixture of upper and lower case letters are a sequence of different sizes and shapes. We notice the differences.

Change and difference can occur in more than size, shape, and color; it can also occur over time. Our attention is drawn by things that move. Yes, we can see things when they are stationary, but when something moves it attracts us, it makes us want to look at it. Predatory animals are particularly sensitive to movement, but when the prey remain motionless it is much harder for the hunter to perceive it. Camouflage only works well when you are sitting still. Many animals are equipped with the coloring and instinct to blend in: fawns lay motionless in the dry grasses and stick insects cling motionless to branches. If they move, they become dinner.

We can use these perceptual principles to our advantage: facilitate scanning by using color, shape, and size cues to create memorable patterns, and draw attention with the use of differences, change, and motion. Although it may be easier to build UIs based on a grid pattern, the reality of our perceptual systems (and of the organic world) is that patterns are based on differences not similarities.