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Mental Models

Aligning design strategy with human behavior

Mental Models

By Indi Young. Rosenfeld Media, February 2008.
ISBNs: paperback (1-933820-06-3); digital editions (1-933820-19-5)

Mental Models

There is no single methodology for creating the perfect product—but you can increase your odds. One of the best ways is to understand users' reasons for doing things. Mental Models gives you the tools to help you grasp, and design for, those reasons. Adaptive Path co-founder Indi Young has written a roll-up-your-sleeves book for designers, managers, and anyone else interested in making design strategic, and successful.

"Indi Young's mental models are the perfect way for your team to integrate your user's perspective into your design. Indi has written a comprehensive guide for anyone who wants to make use of this power design technique. I'll be giving this book out to all of our important clients and insisting they make it part of their process."
—Jared Spool, CEO & Founding Principal, User Interface Engineering

Mental Models is available in full-color paperback and 4 digital versions (screen-optimized and printer-optimized PDF, MOBI, and ePub). Substantial supplemental content is available on this site, and all of the book's images can be downloaded from Flickr.

“Mental Models” Blog

How to Wield Empathy

At at recent workshop, I conducted a spontaneous interview as a demonstration of what I mean by "create a scope perimeter within which any conversation can happen." I asked for a volunteer and for a topic. The volunteer was Daren. The topic was air travel. I scoped the topic down to "planning and booking air travel" just to have a good place to start, and also added "handling the day of travel."

So, with both of us standing at the front of the room, I asked Daren about his thought process as he planned and booked his last flight. He said, "Well, it was a multi-leg flight, and so I knew it would be hard to set up online. So I called. I like to call, anyway. I fly Southwest mostly, and they have really nice reps." I asked him what he meant by "nice reps." The conversation flowed. He was great at describing how he thought. Then he said, "But actually, the customer service at Southwest has changed. It has gotten worse." "How so?" I asked. "Well, recently I flew with my wife and our toddler. As we were walking down the aisle boarding, I was holding my son's hand. Somehow he fell and cut his lip. Luckily we were right near a flight attendant, so I asked her for some gauze or a Band-aid or something. She told me there wasn't any on board, turned away, and just started talking with another passenger. She totally saw my boy's bloody lip! I was so angry!" I wondered out loud, "What did you do?" "I searched my pockets and found a tissue--a dirty tissue--and used it to clean up my son's lip. And my wife was kind of upset at me for letting it happen, so I was also feeling guilty about the whole thing. But I did get up and find the flight attendant and write down her name. I was SO going to complain to management about her!" "And ...?" I prompted. "Well, I cooled off during the flight. She actually came up to us later and was really friendly and helpful. So I decided it would be too much effort to write up a complaint--it wasn't worth it. But I have switched airlines. I used JetBlue on my last business flight." "Why them?" "Oh, I pass their billboard on the highway every morning. I heard they have seatback screens, and I'd like that. I don't like craning my neck to see the screen all the time." The conversation continued in this vein ...

... then I switched topics to "handling the day of travel" just to demonstrate a different type of topic. Daren started out describing his latest business trip on JetBlue. He said, "I like to get to the airport early, like really early, to avoid stress. Maybe I'll sit there and read or work or something." I asked him about his reasons for avoiding stress. He told me, then gave me this example. "On this last trip I spent an hour looking for food. You don't get food on the plane anymore, so you have to buy it ahead of time. Well, I have special dietary needs. Actually, my son has the allergies, but my wife and I eat the same as him just to make things easy. He's allergic to wheat, dairy, nuts, and eggs. So I had to run around looking for something that I could eat. I told myself that morning that I wasn't going to cheat. Sure, it would be easier to just grab something and go, because I'm not the one who's allergic, and my son wasn't with me. But, I wanted to not cheat. So I looked for an Asian place first. Those are usually good--rice is good. But the one I found had teriyaki, which has soy sauce in it. Soy sauce is made with wheat. So I finally ended up at a place that had hamburgers. I bought a hamburger and fries and threw out the buns. I ordered a half pounder because I thought I would need the extra calories if I was going to throw out the buns. I told them no cheese and no mayo. I actually bought two: one to eat then for breakfast and one to eat later on the plane." He continued on with his description. "When I arrived in New York, it was late, but I was hungry again. The only place open was a Jamba Juice, so I thought I could get a smoothie. I spent 20 minutes looking at their menu and realized that all their drinks either had dairy in them or gluten in them." "What did you decide to do?" I asked. "I was hungry, but I just convinced myself to walk away and go get a cab to the hotel. I stood there 20 minutes first."

That's a lot of emotion!

His determination to not cheat on the dietary restrictions of his son stuck with me 30 minutes later, when I went to lunch. I walked into my favorite quick lunch spot: Specialties Cafe & Bakery. It was a relatively new store, and they had these tethered iPads for placing orders. As I browsed through the sandwiches, I tried thinking like Daren did. What sandwich could I buy without wheat, dairy, nuts, or eggs?

A few sandwiches on the menu at Specialties Cafe & Bakery.

Immediately I adopted his approach of throwing out the bread. (Waah! The bread they bake is lovely, and it's pure and simple!) And it looked like I would have to throw out the cheese as well. Wait! There was a peanut butter and banana sandwich--no cheese! Oh, but nuts. Okay, not peanut butter. If I threw out the bread, and the cheese, and asked for no mayo, I would be left with deli meat, lettuce, tomato, onion, and pickle. Wait, could I eat the pickle? Was it pickled using any wheat, like soy sauce contains wheat? I wasn't sure, so I left off the pickle, too. What I was left with was pretty meager, and I knew I couldn't order my favorite cookie to make up for it because of the wheat and eggs and butter. I paused. And sighed. And decided that I had pretended to be Daren for long enough and ordered the peanut butter and banana sandwich with a cookie. I cheated. I felt bad about it.

This is what I mean by empathy. I felt bad about it.

Empathy sounds all wonderful, but it's powerless unless you try out the life of the person you're trying to empathize with. You won't experience the remorse of cheating on dietary restrictions if you don't try to apply those dietary restrictions honestly. I tell people it's similar to what an actor must go through when studying a character. It's the act of leaving yourself behind and stepping into the thought-processes of another person.

When you are designing, how much time do you spend in your own head, applying your own perspective, and how much time do you spend in someone else's mindset? Next time you're designing, try to spend more of the time outside of your own perspective. Make this into a practice. Say things about how you would encounter the design with an "I," but this "I" is the "I" of another human being. "I am starving. I am tired from that long flight from San Francisco, and I'm slightly peeved that all the food places in the airport are closed this late at night. So I'm thrilled to see that Jamba Juice is open--I anticipate gulping down some fruity smoothie within a few minutes. But first I must adhere to my practice--what ingredients are in each drink available? I must read each description very carefully for wheat or wheat by-products. I must scan for dairy. I assume there are no nuts or eggs in these drinks, but I keep that in mind, too, as I study each drink, one by one. I have to set my backpack down beside my suitcase because it is so heavy and this is taking so long ..."

Make empathy a bigger part of your design process.

Just Diving In: Hypothetical Audiences Segments and Interview Skills

BK: I was just re-reading some of the book and I was wondering how important it is to define the task-based segments. I'm not sure anyone here knows what users do well enough to make those guesses. I'm thinking of starting to talk to a few people who look promising and see what they say, but will this be usable later for a mental model?

Indi: Yes, anyone you can get to tell stories about their motivations will be usable in a mental model diagram. It will be a random or a homogeneous collection of stories, though. As far as defining some hypothetical audience segments up front, it's an exercise to define and broaden your understanding of who you are supporting. Most people answer "everyone" when I ask, "Who will use this offering?" It's not a good answer and keeps many organizations in chaos. It's sometimes very difficult to undertake this exercise, but it is so helpful. I'm cajoling a client through the process this week in fact. Even if the groups you define now change completely once you have collected real stories from them, it's important to try. If you don't try to define some groups, then a) the scope of your research will be too broad, and b) you will miss talking to some people you might not have had in mind at first.

BK: Could I just ask how you honed your non-directive interviewing skills? Did you just start and then improve over time or did you study books, take courses or similar?

Indi: I started doing interviews in 1993 as a part of understanding the "lay of the land" for customer service reps at a call center in Baltimore. I considered myself a software engineer at the time, having graduated with a degree in Computer Science in 1987. So I think it was a skill I took from the deconstructive approach for writing code. They never taught us to interview people, but they did teach us to come at problems as neutrally as possible. So in the end, I guess my answer to your question is that I just dove into it. I try always to improve. I practice whenever I'm near people like at the checkout line or at community meetings. It's far easier to be curious and neutral with "familiar strangers" like these situations than with people you know. Use every opportunity you can to practice.

BK: I'm gradually cajoling my colleagues into letting me loose on the customers. I have to introduce the idea of user-experience-based user research. I'm still at the stage of trying to convince them of the value (compared to analytics / market research), since you know the non-directive interviewing can raise a few eyebrows. I'll be putting a case together. This will definitely be a 'dive into it' approach for sure.

Indi: Good! Dive into it! Employing a pop-up on a site with a few questions is a great way to collect leads. List these names and get back to each of them for a five minute chat (which needs to be by voice, but only 5 minutes) to find out who they are (in terms of your behavioral audience segments plus in terms of whatever demographics are interesting to your organization) and if they can talk story. This is really the reason why you need to call them. You can't find out if a person can talk story by email.

Once you find some people you really want to talk to, set up a time to have a conversation for 30 or 60 minutes. This is the fun part! This is where you start by introducing the scope of what you're doing and then simply ask, "So, what are your thought processes and reactions during this?" Then you let the stories flow for a while. No interview questions are needed. Simply be curious and ask for lots of explanations of thoughts, beliefs, and feelings. This is the information from which you will make your mental model.

Alternately, you've read about the lightning quick short-cut, right?

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