has its origins in web and graphic , but has grown into a realm of its own. Far from merely working with text and pictures, interaction designers are now responsible for creating every element on the screen that a user might swipe, click, tap, or type: in short, the interactions of an experience.

This article serves as a good jumping off point for people interested in learning more about Interaction Design. To that end, we’ll briefly cover the history, guiding principles, noteworthy contributors, and tools related to this fascinating discipline.

What is Interaction Design?

Interaction Design (IxD) defines the structure and behavior of interactive systems. Interaction designers strive to create meaningful relationships between people and the products and services that they use, from computers to mobile devices to appliances and beyond. Our practices are evolving with the world.

The Interaction Design Association (IxDA)

Interaction design began the day the first screen was designed to hold more than static copy. Everything from a button to a link to a form field is part of interaction design. Over the past several decades, a number of books have been released that explain facets of interaction design, and explore the myriad ways it intersects and overlaps with experience design.

Interaction design has evolved to facilitate interactions between people and their environment. Unlike user experience design, which accounts for all user-facing aspects of a system, interaction designers are only concerned with the specific interactions between users and a screen. Of course, in practice things are never so crisply delineated.

Common Methodologies

Although interaction design spans myriad types of web and mobile applications and sites, there are certain methodologies that all designers rely on. We’ll explore some of the more common methodologies here: goal-driven design, usability, the five dimensions, cognitive psychology, and human interface guidelines.

Goal-Driven Design

Goal-driven design was popularized by Alan Cooper, in his book The Inmates Are Running the Asylum: Why High-Tech Products Drive Us Crazy and How to Restore the Sanity, published in 1999. Alan defines goal-driven design as design that holds problem solving as a highest priority. In other words, goal-driven design focuses first and foremost on satisfying specific needs and desires of the end-user, as opposed to older methods of design, which focused on what capabilities were available on the technology side of things.

Today, some of the points Alan brings up seem obvious, since designers rarely select interactions based solely on development constraints. However, at its heart, the methodology is all about satisfying the end-user’s needs and wants, which is just as necessary today as it ever was.

The process involved in goal-driven design, according to Alan, requires five shifts in the way we think as interaction designers.

5tenets
  1. Design first; program second. In other words, goal-driven design begins with considerations for how users interact (and how things look!), rather than beginning with technical considerations.
  2. Separate responsibility for design from responsibility for programming. This refers to the necessity of having an interaction designer who can champion the end-user, without worrying about the technical constraints. A designer should be able to trust his or her developer to handle the technical aspects; in fact Alan Cooper suggests that to do otherwise places the designer in a conflict of interest.
  3. Hold designers responsible for product quality and user satisfaction. Though stakeholders or clients will have their own objectives, the interaction designer has a responsibility to the person on the other side of the screen.
  4. This particular idea has developed into something that is now more commonly associated with user research: personas. Yet Alan reminds us to connect personas back to the product, and constantly ask: where will this person use this? Who are they? What do they want to accomplish?
  5. Work in teams of two. Lastly, interaction designers should never work in a silo. Collaboration with others, which Alan Cooper calls a “design communicator,” is key. Though the design communicator Alan envisioned in 1999 was typically a copywriter intended to provide marketing copy for products, today that has expanded to include a project manager, content strategist, information architect, and many others.

Usability

Usability may feel like a vague term, but at its heart, designers are simply asking “can someone easily use this?” It’s been explained in books and online in a myriad of ways, and we will review a few different definitions to uncover some common themes and nuances:

In the book Human Computer Interaction by authors Alan Dix, Janet E. Finlay, Gregory D. Abowd, Russell Beale, usability is broken down into three principles:

  • Learnability: how easily can a new user learn to navigate the interface?
  • Flexibility: how many ways can a user interact with the system?
  • Robustness: how well are we supporting users when they face errors?

Meanwhile, Nielsen and Schneiderman explain usability as being made up of five principles:

  • Learnability: how easily can a new user learn to navigate the interface?
  • Efficiency: how quickly can users perform tasks?
  • Memorability: if a user hasn’t visited the system in a while, how well will they remember the interface?
  • Errors: how many errors do users make, and how quickly can they recover from errors?
  • Satisfaction: do users enjoy using the interface, and are they pleased with the results?

Lastly, the international standard (ISO 9241) has also broken down the word into five principles:

  • Learnability: how easily can a new user learn to navigate the interface?
  • Understandability: how well can a user understand what they are seeing?
  • Operability: how much control does the user have within the interface?
  • Attractiveness: how visually appealing is the interface?
  • Usability compliance: does the interface adhere to standards?

Clearly, there are common themes that make up what it means for an interface to be “usable.” Regardless of the usability principles a designer follows, it’s an important consideration for any interface.

The Five Dimensions

In Bill Moggridge’s book of interviews, Designing Interactions, Gillian Crampton Smith, an academic in interaction design, introduced the concept of four dimensions of an “interaction design language.” In other words, these dimensions make up the interactions themselves, and as a result they make up the communication between a user and the screen. The four original dimensions are: words, visual representations, physical objects or space, and time. More recently, Kevin Silver, senior interaction designer at IDEXX Laboratories, has added a fifth dimension, behavior.

  • 1D: words should be simple to understand, and written in such a way that they communicate information easily to the end user.
  • 2D: visual representations are all graphics or images, essentially everything that is not text. They should be used in moderation, so as to not overwhelm.
  • 3D: physical objects or space refers to the physical hardware, whether it’s a mouse and keyboard, or a mobile device a user interacts with.
  • 4D: time is the length that the user spends interacting with the first three dimensions. It includes the ways in which the user might measure progress, as well as sound and animation.
  • 5D: behavior was added by Kevin Silver in his article, What Puts the Design in Interaction Design. It is the emotions and reactions that the user has when interacting with the system.

Using these five dimensions, an interaction designer can pay attention to the very experience the user has when communicating and connecting with a system.

Cognitive Psychology

Cognitive psychology is the study of how the mind works, and what mental processes take place there. According to the American Psychological Association, these processes include “attention, language use, memory, perception, problem solving, creativity, and thinking.”

While psychology is an immensely broad field, there are a few key elements of cognitive psychology that are particularly valued, and in fact may have helped form the field of interaction design. Don Norman called out many of them in his book, The Design of Everyday Things. Here are just a few.

  • Mental models are the images in a user’s mind that inform their expectation of a certain interaction or system. By learning the user’s mental model, interaction designers can create systems that feel intuitive.
  • Interface metaphors make use of known actions to lead users to new actions. For example, the trash icon on most computers resembles a physical trash can, in order to alert a user to the expected action.
  • Affordances are things that are not only designed to do something, but that are designed to look like they are designed to do something. A button that looks like a physical object you can push, for example, is an affordance designed so that someone unfamiliar with the button will still understand how to interact with it.

Human Interface Guidelines

This section is a bit of a misnomer; there actually is no single set of human interface guidelines. However, the idea behind creating human interface guidelines is in itself a methodology. Guidelines have been created by most major technology design businesses, including Apple and Android, Java and Windows. The goal is the same for all of them: to alert prospective designers and developers to advice and recommendations that will help them to create universally intuitive interfaces and programs.

Daily Tasks and Deliverables

An interaction designer is a key player throughout the entire development process. They have a set of activities that are key to the project team. These typically include forming a design strategy, wireframing key interactions, and prototyping interactions.

Design Strategy

Although the boundaries here are fuzzy, one is certain: an interaction designer will need to know who they are designing for and what the user’s goals are. Typically, this is provided by a user researcher. In turn, an interaction designer will assess the goals and develop a design strategy, either independently or with help from other designers on the team. A design strategy will help team members have a common understanding of what interactions need to take place to facilitate user goals.

Wireframes of Key Interactions

After the interaction designer has a good idea of the strategy motivating a design, they can begin to sketch the interfaces that will facilitate the necessary interactions. The devil here lies in the details: some professionals will literally sketch these interactions on a pad/dry-erase board while others will use web applications to aid them in the process, and some will use a combination thereof. Some professionals will create these interfaces collaboratively while others will create them alone. It all depends on the interaction designer and their particular workflow.

Prototypes

Depending on the project, the next logical step for an interaction designer might involve the creation of prototypes. There are a number of different ways in which a team might prototype an interaction, which we won’t be covering in extensive detail here, such as html/css prototypes, or paper prototypes.

Stay Current

One of the hardest parts about being a practicing interaction designer is the speed of change in the industry. Every day, new designers are taking the medium in a different direction. Consequently, users are expecting these new kinds of interactions to appear on your website. The prudent interaction designer responds to this evolution by constantly exploring the web for new interactions and taking advantage of new technologies—while always keeping in mind that the right interaction or technology is the one that best meets the persona’s needs, and not merely the newest or most exciting. Interaction designers also stay current by following thought leaders (like the notable designers below) on Twitter, and pushing the medium forward themselves.

People to Follow

As we noted before, it’s nearly impossible to identify someone as “only” an interaction designer. The field overlaps with UX design, UI design, development, and visual design, and as a result not all the designers listed here even refer to themselves as interaction designers. We’ve included them because of their impact on the field, and because the things they have taught and written about are worth exploring if you yourself work in interaction design.

Brad Frost is leading a charge: Death to Bullshit. Death to Bullshit is “a rallying cry to rid the world of bullshit and demand experiences that respect people and their time.” Brad helps by creating those experiences as a web designer, and championing them as a writer, consultant, and speaker. While Brad is technically a front-end developer, the line between developer and interaction designer is thin, and his work has had a huge impact on the interaction design community, in part because of the tools and resources he has created. These resources include This Is Responsive, Pattern Lab, Styleguides.io, WTF Mobile Web, and Mobile Web Best Practices. Brad also coined the phrase (and wrote the book on) Atomic Design.

Whitney Hess’s life’s mission is to put humanity back into business. Whitney co-hosts the podcast Designing Yourself, writes on her blog Pleasure & Pain, and speaks at conferences and corporations worldwide. She holds a Masters in Human-Computer Interaction and a Bachelor’s degree in Professional Writing and HCI from Carnegie Mellon University, and in 2014 became a certified coach through New Ventures West.

Kim Goodwin is the author of the bestselling book, Designing for the Digital Age. Kim is currently consulting for clients in varied industries including aviation, consumer electronics, and retail. She spent most of the last decade as Vice-President, Design and General Manager at Cooper, leading an integrated practice of interaction, visual, and industrial designers and the development of the acclaimed Cooper U design curriculum. Her range of experience and a passion for teaching have led to Kim’s popularity as an author and as a speaker at conferences and companies around the world.

Brenda Laurel has been part of several major revolutions in the way humans use computers: virtual reality, interactive narratives and some fresh approaches to gaming and AI. She served as a founding chair and professor at the California College of the Arts Graduate Program of Design. She has worked for Atari, co-founded game development firm Purple Moon, and served as an interaction design consultant for multiple companies, including Sony Pictures, Apple, and Citibank.

Mat Marquis is another interaction designer who blurs the line between designer and developer. He is the technical editor at A List Apart, where he curates articles by designers and developers to help educate the design community. He has also spoken at several An Event Apart conferences. He chairs the Responsive Images Community Group, a group that seeks solutions for images in responsive design. He is also an active member of the open source community, helping other designers to move their work forward by building off one another. Mat was most recently at Bocoup, a web platform consulting firm that builds or contributes to open access projects.

Karen has spent more than fifteen years trying to make the web a better place through usability, user experience design, and content strategy. In 2006, she founded Bond Art + Science, a UX consultancy that has supported companies like The Atlantic, Fast Company, Franklin Templeton, and Fidelity. Karen consults in content strategy, user experience, and information architecture; and she teaches design management in the MFA in Interaction Design program at the School of Visual Arts in New York. Beyond all that, Karen serves as VP of Digital for the venture capital firm, Ignite Venture Partners, and wrote Content Strategy for Mobile and Going Responsive through A Book Apart.

Mike Monteiro is the co-founder of Mule, a design agency renowned for exploring those dark territories where content strategy, online identity, and cutting-edge web technology with classic, timeless design blend together. Mike has written two books, Design Is a Job, and You’re My Favorite Client, in which he screams to the world his love for hard work, self-awareness, and the importance of a good tailor. Mike continues to deliver edgy, honest talks at conferences and gatherings around the world, like “This is the Golden Age of Design (and we’re screwed).”

Theresa Neil is a User Experience consultant located in Austin, Texas. She has led the design for more than 100 web, desktop and mobile applications since 2001. Clients include a diverse mix of Fortune 500 companies, non-profit organizations, and local Austin start-ups. She co-authored Designing Web Interfaces with designer and developer Bill Scott, and she wrote Mobile Design Pattern Gallery to help designers with app and smartphone designs. Her work can be seen at www.theresaneil.com.

Don Norman studies how real people interact with design, exploring the gulf between what a designer intends and what a regular person actually wants. His work has resulted in some classic books, including The Design of Everyday Things, which is generally considered to be a cornerstone of the user experience canon.

Brenda Sanderson is Executive Director of the 50,000+ member IxDA, the global network dedicated to the professional practice of Interaction Design. Over 15 years as a practicing designer brought Brenda through design studios, print shops, daily newspapers, publishing companies and the advertising industry. She has been recognized nationally for her design work and for her writing on technology’s impact on the creative field.

Bill Scott helped create the Yahoo! Design Pattern Library in 2006. His work on the pattern library has impacted designers around the world since that time. Bill is a designer and developer, and his work has included the creation of a 3D graphics library, wargaming interfaces for NATO, and many open source projects. He co-authored Designing Web Interfaces with Theresa Neil, and is a frequent conference speaker.

Interaction designers use a number of different tools to get their jobs done. Whether they’re sketching an interaction on a napkin or presenting a prototype to a client, their goal is the same: communication via conversation. Above all else, interaction designers need to communicate well. The list below is a sampling of tools used to facilitate conversations. Keep in mind that the web interfaces that are created are typically done so with user-facing (front-end) technologies such as JavaScript or CSS.

Balsamiq Mockups

balsamiq

Balsamiq Mockups is an Adobe Air app that makes wireframing an interaction easy. The team at Balsamiq has done a superb job, providing users with a number of interaction design patterns that are ubiquitous to contemporary application design. What’s more, Balsamiq keeps their interface simple, using a hand drawn style for elements and comic sans as a font face. This enables the designer and stakeholders to focus their efforts (and their clients’ feedback) on interaction, by removing the extraneous design elements. Think of it as an online version of paper prototyping!

Learn more about Balsamiq Mockups

InVision

invisionapp

InVision is a free web and mobile prototyping tool for Mac and Windows. InVision is designed to facilitate communication and does so by integrating with Photoshop, Sketch, Slack, Jira, and other applications. Designers can upload wireframes and string them together via hotspots into a 2D navigable experience. Clients, stakeholders, and colleagues can add comments directly on the design, and with LiveShare, InVision’s real-time presentation tool, the app enables live whiteboarding.

Learn more about InVision

LucidChart

omnigraffle

LucidChart is a flexible diagramming software for everything from Android and iOS experiences to flowcharts, journey maps, wireframes and site mockups. LucidChart offers a number of helpful integrations with the Google Suite, InVision, Atlassian, Slack, and more. This tool manages to be incredibly complex, but intuitive and flexible at the same time. It’s loved by design and UX teams as well as IT support groups and engineers.

Learn more about LucidChart

Patternry

patternry

No one wants to waste time reinventing the wheel. A good interaction library saves time and energy designing or coding a common interaction, and ensures consistency across designs. Patternry is a tool that allows teams of interaction designers to share and store their design and code assets in one central location (i.e. the library). What’s great about Patternry is that it’s more than just a repository; it also provides a starting point, with dozens of patterns for common interactions and modules.

Learn more about Pattenry

Sketch

sketch

Sketch is a design tool (Mac only), best used for icons or medium-to-high fidelity mockups. A lightweight alternative to Adobe Photoshop, Sketch offers layers, grids, and artboards; in short, everything an interaction designer requires to create wireframes and mockups with some visual additions. Want to get more out of Sketch? Consider Zeplin, the Sketch plugin (currently in Beta) to allow for team collaboration.

Learn more about Sketch

Axure

axure

Axure RP is arguably the best interaction design tool on the market. Boasting far more robust functionality than Balsamiq, built-in collaboration and sharing, and the ability to easily convert a wireframe to a prototype, Axure seems to offer everything. The one downside is that it perhaps offers too much, which means it has a slow learning curve.

Learn more about Axure RP

Principle

Principle for Mac is an open source platform that focuses on functionality and transitions. It works from Sketch artboards in an animation-style layout and offers a huge variety of movements. It’s a free, easy-to-learn interface, with a solid suite of YouTube tutorials and help articles available. The coolest part is that as you build your artboards into a moving, cohesive thing, Principle gives you a working prototype to play with in a separate window that has a built-in screen recorder, too!

Learn more about Principle

Associations

An interaction designer is still an IxD whether or not they belong to any particular group. Still, finding other designers is a great way to network and learn from others in the field. All of these associations are available across the United States, and some exist internationally as well.

IXDA

In their own words:
the IxDA network provides an online forum for the discussion of interaction design issues as well as other platforms for people who are passionate about interaction design to gather and advance the discipline.

More information available at: http://www.ixda.org/

IxDA also offers an annual conference for designers, called Interaction Week, that moves around the globe, but continues to offer stellar content and insight from the industry’s leading experts.

AIGA

Although the AIGA (American Institute of Graphic Arts) was initially founded for graphic designers, the organization itself realizes that graphic designers are more frequently designing compositions for new media, in which interaction design plays a major part. Local AIGA chapters are available throughout the United States, and host events ranging from Photoshop Layer Tennis, to art exhibitions.

More information available at: http://www.aiga.org/

An Event Apart

Hosted around the US, for the last 13 years, An Event Apart has gathered the premiere web and interaction design voices under one roof. This conference is delivered in an intensive, three-day, single-track format with up to 18 separate speakers. They cover topics relevant to developers, designers, UX and UI specialists, account managers, project managers, and more in a clear, digestible way. An Event Apart has consistently hosted some of the industry’s leading thinkers and doers.

More information available at: https://aneventapart.com/

Meetup

To be fair, there is no one Meetup group. That’s the beauty of it: search “interaction design” in your city on the Meetup interface or go to http://ia.meetup.com/, and you’ll find any number of networking groups, educational groups, and social groups. If you happen to live in an area where an Interaction Design (or User Experience Design) meetup doesn’t yet exist, now’s the time to start! As it happens, Meetup’s interface also makes it easy to start a new group.

More information available at: http://www.meetup.com/

Books

The list of books relevant to interaction design could span many pages by itself. Here, we’ve narrowed the list to just a few iconic books. If you’re really itching to expand your library, though, check out our recommended books for your user experience library.


Designing for Interaction: Creating Innovative Applications and Devices (2nd Edition)

Designing for the Digital Age: How to Create Human-Centered Products and Services

Designing for the Digital Age: How to Create Human-Centered Products and Services

Kim Goodwin

In Designing for the Digital Age, Kim Goodwin takes the bull by the horns: we as a culture need to accept that all of our products and services have been made more complicated by their technological constraints and opportunities. No matter how much incredible functionality is possible, we can’t ignore the possible confusion the digital realm brings to our users. Goodwin explores the benefits and challenges designers face, and offers processes and activities to offer better experiences, without complications.


Designing Interfaces

Designing Interfaces

Jenifer Tidwell

Over the years, Designing Interfaces has become so ubiquitous it has become known by its nickname, “the book with the bird.” But its popularity is for an excellent reason: Jenifer Tidwell explains best practices, provides rich examples, and leaves the reader with enough methods and guidance to inspire future designs.


Interaction Design: Beyond Human-Computer Interaction

Interaction Design: Beyond Human-Computer Interaction

Yvonne Rogers

Now in its third edition, Rogers’ book offers a look at how we design, both technically and ethically. Each chapter helps provide a foundation for “how to design interactive products that enhance and extend the way people communicate, interact and work.” The book includes case studies, examples, questions, and insight into future trends.


The Design of Everyday Things

The Design of Everyday Things

Don Norman

The Design of Everyday Things is a classic. It is the book that changed design from a “nice-to-have” into a necessity. In it, Don Norman exposed the value of usable, intuitive design in every facet of our daily lives. He outlines a series of rules to follow, in order to create simple, usable products and effortless experiences.


Don’t Make Me Think

Don’t Make Me Think

Steve Krug

A short but robust book, Don’t Make Me Think is both a fun read and informative. In it, Steve Krug covers the basics of designing interactions that are user-proof. Krug’s experience as a usability consultant provides him with plenty of real-world examples and concrete solutions to problems every interaction designer has come up against.



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