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To show how effective your designs are, talk about user behavior change

Design isn’t just about looking nice: it’s about changing user behavior

Kai Wong
UX Collective
Published in
5 min readDec 17, 2024

A woman throwing a soda into a trash can
Photo by Julio Lopez: https://www.pexels.com/photo/a-person-throwing-a-to-go-cup-in-a-garbage-can-12894741/

One of my most visually unappealing case studies is often the one that interests interviewers.

It’s a simple, unassuming form re-design that gets people to stop for one reason: I changed the user behavior of 231,000+ field office workers misfiling a particular claim.

A simple and somewhat plain design that is about contacting designees. There’s tables, ugly buttons, a badge, and more stuff that’s blurred out.
This (plain) design has started a lot of interviews

When you start to design at scale, one of the most important to understand is the power of designing for behavior change.

Behavior change isn’t something that seems related to the design process.

However, defining the behavior you want to change can be equally important for one key reason: it’s a way to show the impact of design, even if you don’t have metrics.

To understand why, you must first realize we’re not discussing complex behavior change.

Behavior change can be simple, too.

When people hear the words “Behavior change,” they often imagine fields like behavioral psychology, which are about changing complex and drastic behaviors.

People might imagine behavioral psychologists that help people quit smoking, address their anxiety, or other complex topics.

However, behavior change for UX is much simpler and smaller in scale. We’re not addressing deep-seated issues. We’re designing to either change undesirable behaviors or create desired behaviors.

For example, imagine you’re asked to re-design a flawed checkout process. A business pulled together a team, a budget, and a timeline to fix the feature because of undesirable user behavior.

The undesirable user behavior, in this case, might be that 65% of all users are abandoning the checkout process. In that case, UX needs to tackle two things:

  • Figure out Why users behave this way
  • Figure out What to design that might change this user behavior

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Written by Kai Wong

7xTop writer in UX Design. UX, Data Viz, and Data. Author of Data-Informed UX Design: https://tinyurl.com/2p83hkav. Substack: https://dataanddesign.substack.com

Responses (3)

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Your connection between user research leading to optimized UX design and subsequent positive product outcomes makes an insightful argument for showcasing design impact, but I would also emphasize the role of continuous feedback loops in refining these processes. Thanks

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Highlighting the distinction between visually appealing designs and those that induce behavior change offered a valuable insight but I would also suggest exploring how aesthetics can sometimes enhance user engagement by driving initial interest even if behavior change remains the core objective.

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Hey there, Kai,
I found your discussion on designing for behavior change particularly insightful because I also have encountered projects where aligning design outcomes with user behavior was crucial in my time as a Senior Engineer. Tackling user…

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