Which comes first: card sorting or tree testing?

A great information architecture (IA) is essential for a great user experience (UX). And testing your website or app’s information architecture is necessary to get it right.

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Card sorting and tree testing are the very best UX research methods for exactly this. But the big question is always: which one should you use, and when? Very possibly you need both. Let’s find out with this quick summary.

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What is card sorting and tree testing? 🧐

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Card sorting is used to test the information architecture of a website or app. Participants group individual labels (cards) into different categories according to  criteria that makes best sense to them. Each label represents an item that needs to be categorized. The results provide deep insights to guide decisions needed to create an intuitive navigation, comprehensive labeling and content that is organized in a user-friendly way.

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Tree testing is also used to test the information architecture of a website or app. When using tree testing participants are presented with a site structure and a set of tasks they need to complete. The goal for participants is to find their way through the site and complete their task. The test shows whether the structure of your website corresponds to what users expect and how easily (or not) they can navigate and complete their tasks.

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What are the differences? 🂱 👉🌴

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Card sorting is a UX research method which helps to gather insights about your content categorization. It focuses on creating an information architecture that responds intuitively to the users’ expectations. Things like which items go best together, the best options for labeling, what categories users expect to find on each menu.

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Doing a simple card sort can give you all those pieces of information and so much more. You start understanding your user’s thoughts and expectations. Gathering enough insights and information to enable you to develop several information architecture options.

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Tree testing is a UX research method that is almost a card sort in reverse. Tree testing is used to evaluate an information architecture structure and simply allows you to see what works and what doesn’t. 

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Using tree testing will provide insights around whether your information architecture is intuitive to navigate, the labels easy to follow and ultimately if your items are categorized in a place that makes sense. Conversely it will also show where your users get lost and how.

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What method should you use? 🤷

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You’ve got this far and fine-tuning your information architecture should be a priority. An intuitive IA is an integral component of a user-friendly product. Creating a product that is usable and an experience users will come back for.

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If you are still wondering which method you should use - tree testing or card sorting. The answer is pretty simple - use both.

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Just like many great things, these methods work best together. They complement each other, allowing you to get much deeper insights and a rounded view of how your IA performs and where to make improvements than when used separately. We cover more reasons why card sorting loves tree testing in our article which dives deeper into why to use both.

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Ok, I'm using both, but which comes first? 🐓🥚

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Wanting full, rounded insights into your information architecture is great. And we know that tree testing and card sorting work well together. But is there an order you should do the testing in? It really depends on the particular context of your research - what you’re trying to achieve and your situation. 

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Tree testing is a great tool to use when you have a product that is already up and running. By running a tree test first you can quickly establish where there may be issues, or snags. Places where users get caught and need help. From there you can try and solve potential issues by moving on to a card sort. 

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Card sorting is a super useful method that can be instigated at any stage of the design process, from planning to development and beyond.  As long as there is an IA structure that can be tested again. Testing against an already existing website navigation can be informative. Or testing a reorganization of items (new or existing) can ensure the organization can align with what users expect.

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However, when you decide to implement both of the methods in your research, where possible, tree testing should come before card sorting. If you want a little more on the issue have a read of our article here.

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Check out our OptimalSort and Treejack tools - we can help you with your research and the best way forward. Wherever you might be in the process.

In 2009, Bob Bailey and Cari Wolfson published apaper entitled “FirstClick Usability Testing: A new methodology for predicting users’ success on tasks”. They’d analyzed 12 scenario-based user tests and concluded that the first click people make is a strong leading indicator of their ultimate success on a given task. Their results were so compelling that we got all excited and created Chalkmark, a tool especially for first click usability testing. It occurred to me recently that we’ve never revisited the original premise for ourselves in any meaningful way.

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And then one day I realized that, as if by magic, we’re sitting on quite possibly the world’s biggest database of tree test results. I wondered: can we use these results to back up Bob and Cari’s findings (and thus the relevanceof Chalkmark)?Hell yes we can.So we’ve analyzed tree testing data from millions of responses in Treejack, and we're thrilled (relieved) that it confirmed the findings from the 2009 paper — convincingly.

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What the original study found

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Bob and Cari analyzed data from twelve usability studies on websites and products ‘with varying amounts and types of content, a range of subject matter complexity, and distinct user interfaces’. They found that people were about twice as likely to complete a task successfully if they got their first click right, than if they got it wrong:

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If the first click was correct, the chances of getting the entire scenario correct was 87%If the first click was incorrect, the chances of eventually getting the scenario correct was only 46%

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What our analysis of tree testing data has found

We analyzed millions of tree testing responses in our database. We've found that people who get the first click correct are almost three times as likely to complete a task successfully:

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If the first click was correct, the chances of getting the entire scenario correct was 70%If the first click was incorrect, the chances of eventually getting the scenario correct was 24%

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To give you another perspective on the same data, here's the inverse:

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If the first click was correct, the chances of getting the entire scenario incorrect was 30%If the first click was incorrect, the chances of getting the whole scenario incorrect was 76%

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How Treejack measures first clicks and task success

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Bob and Cari proved the usefulness of the methodology by linking two key metrics in scenario-based usability studies: first clicks and task success. Chalkmark doesn't measure task success — it's up to the researcher to determine as they're setting up the study what constitutes 'success', and then to interpret the results accordingly. Treejack does measure task success — and first clicks.

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In a tree test, participants are asked to complete a task by clicking though a text-only version of a website hierarchy, and then clicking 'I'd find it here' when they've chosen an answer. Each task in a tree test has a pre-determined correct answer — as was the case in Bob and Cari's usability studies — and every click is recorded, so we can see participant paths in detail.

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Thus, every single time a person completes an individual Treejack task, we record both their first click and whether they are successful or not. When we came to test the 'correct first click leads to task success' hypothesis, we could therefore mine data from millions of task.

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To illustrate this, have a look at the results for one task.The overall Task result, you see a score for success and directness, and a breakdown of whether each Success, Fail, or Skip was direct (they went straight to an answer), or indirect (they went back up the tree before they selected an answer):

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In the pietree for the same task, you can look in more detail at how many people went the wrong way froma label (each label representing one page of your website):

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In the First Click tab, you get a percentage breakdown of which label people clicked first to complete the task:

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And in the Paths tab, you can view individual participant paths in detail (including first clicks), and can filter the table by direct and indirect success, fails, and skips (this table is only displaying direct success and direct fail paths):

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How to get busy with first click testing

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This analysis reinforces something we already knew that firstclicks matter. It is worth your time to get that first impression right.You have plenty of options for measuring the link between first clicks and task success in your scenario-based usability tests. From simply noting where your participants go during observations, to gathering quantitative first click data via online tools, you'll win either way. And if you want to add the latter to your research, Chalkmark can give you first click data on wireframes and landing pages,and Treejack on your information architecture.

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To finish, here's a few invaluable insights from other researchers ongetting the most from first click testing:

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• Jeff Sauro details a useful approach to running a first click test, and shares the findings from a test he ran on 13 people.
• An article on Neoinsight describes three common usability problems that first click testing can solve.
• Gianna LaPin describes a first click test she ran on Netflix, VUDU, and Hulu Plus.

Recently, Optimal Workshop partnered with Eniola Abioye, Lead UX Researcher at Meta and UXR Career Coach at UX Outloud to host a career masterclass featuring practical advice and guidance on how to: revamp and build a portfolio, emphasize the impact of your projects and showcase valuable collaborations. It also included panel discussions with experts from a variety of roles (UX, product management, engineering, career coaching and content design) talking about their journeys to becoming UX leaders. 

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Keep reading to get key takeaways from the discussion on:

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• How to show the impact of your UX work
• Common blockers in UX work
• How to collaborate with cross-functional UX stakeholders 
• How to build a resume and portfolio that uses industry language to present your experience

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How to show the impact of your UX 💥

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At a time when businesses are reducing costs to focus on profitability - proving the value of your work is more important than ever. Unfortunately, measuring the impact of UX isn’t as straightforward as tracking sales or marketing metrics. With this in mind, Eniola asked the panelists - how do you show the impact of UX in your work?Providing insights is simply not enough. “As a product manager, what I really care about is insights plus recommendations, because recommendations make my life easier,” said Kwame Odame. 

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Auset Parris added her perspective on this topic as a Growth Content Designer, “the biggest thing for me to be impactful in my space [Content Design] is to consistently document the changes that I’ve made and share them with the team along with recommendations.” Auset also offered her perspective regarding recommendations, “recommendations are not always going to lead to the actual product executions, but recommendations are meant to guide us.” When it comes to deciding which recommendation to proceed with (if any) it's important to consider whether or not they are aligned with the overarching goal. 

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Blockers in UX work 🚧

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As UXR becomes more democratized in many businesses and the number of stakeholders increases, the ability to gain cross-functional buy-in for the role and outcomes of UXR is a key way to help keep research a priority. 

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In his past experience, Kwame has realized that the role of a user experience researcher is just as important as that of a product manager, data scientist, engineer, or designer. However, one of the biggest blockers for him as a product manager is how the role of a UX researcher is often overlooked. “Just because I’m the product manager doesn’t mean that I’m owning every aspect of the product. I don’t have a magic wand right? We all work as a team.” Furthermore, Kwame notes that a user researcher is an incredibly hard role and a very important one, and I think we need to invest more in the UX space.

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Auset also shared her perspective on the topic, “I wouldn’t say this is a blocker, but I do think this is a challenging piece of working in a team - there are so many stakeholders.” Although it would be ideal for each of the different departments to work seamlessly together at all times, that’s not always the case. Auset spoke about a time where the data scientists and user researchers were in disagreement. Her role as a Growth Content Designer is to create content that enhances the user experience. “But if I’m seeing two different experiences, how do I move forward? That’s when I have to ask everyone - come on let’s dig deeper. Are we looking at the right things?” If team members are seeing different results, or having different opinions, then maybe they are not asking the right questions and it's time to dig deeper. 

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How to collaborate with cross-functional UX stakeholders 🫱🏽🫲🏻

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The number and type of roles that now engage with research are increasing. As they do, the ability to collaborate and manage stakeholders in research projects has become essential. 

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Kwame discussed how he sets up a meeting for the team to discuss their goals for the next 6 months. Then, he meets with the team on a weekly basis to ensure alignment. The main point of the meeting is to ensure everyone is leaving with their questions answered and blockers addressed. It's important to ensure everyone is moving in the right direction. 

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Auset added that she thinks documentation is key to ensuring alignment. “One thing that has been helpful for me is having the documentation in the form of a product brief or content brief.” The brief can include the overarching goal, strategy, and indicate what each member of the team is working on. Team members can always look back at this document to ensure they are on the right track. 

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Career advice: documenting the value you bring 💼

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One of the participants asked the panel, “how do you secure the stability of your UX career?” 

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Eniola took this opportunity to share some invaluable advice as a career coach, “I think the biggest thing that comes to mind is value proposition. It's important to be very clear about the value and impact you bring to the team. It used to be enough to just be really, really good at research and just do research and provide recommendations. Now that’s not enough. Now you have to take your teams through the process, integrate your recommendations into the product, and focus on driving impact.” 

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Companies aren’t looking to hire someone who can perform a laundry list of tasks, they’re looking for UX professionals who can drive results. Think about the metrics you can track, to help showcase the impact of your work. For example, if you’re a UX designer - how much less time did the user spend on the task with your new design? Did the abandonment or error rate decrease significantly as a result of your work? How much did the overall customer satisfaction score rise, after you implemented your project? Before starting your project, decide on several metrics to track (make sure they align with your organization’s goals), and reflect on these after each project. 

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Fatimah Richmond offered another piece of golden career advice. She encourages UX researchers to create an ongoing impact tracker. She’ll create a document where she lists the company's objectives, the projects she worked on, and the specific impact she made on the companies objectives. It's much easier to keep track of the wins as they happen, and jot a few notes about the impact you’ve made with each project, then scrambling to think of all the impact you’ve made when writing your resume. It's also important to note the impact your work has made on the different departments - product, marketing, sales, etc.

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She also advises UX researchers to frequently share their science insights with their colleagues as the project progresses. Instead of waiting until the very end of the project and providing a “perfectly polished” deck, be transparent with the team about what you are working on and the impact it's having throughout the duration of the project.

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Another participant asked - what if you need help determining the value you bring? Auset recommends asking for actionable feedback from coworkers. These people work with you every single day, so they know your contributions you are making to the team. 

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Documenting the tangible impact you make as a UX professional is crucial - not only will it help create greater stability for your career, but it will also help organizations recognize the importance of a UX research. As Kwame discussed in the “blockers” section, one of the biggest challenges he faces as a product manager is the perception of the UX role as less important than the more traditional product manager, Engineer, and Designer roles. 

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About Eniola Abioye

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Eniola helps UX researchers improve their research practice. Whether you’re seasoned and looking to level up or a new researcher looking to get your bearings in UX, Eniola can help you focus and apply your skillset. She is a UX Researcher and Founder of UX Outloud. As a career coach, she guides her clients through short and long term SMART goals and then works with them to build a strategic plan of attack. She is innately curious, a self-starter, adaptable, and communicative with a knack for storytelling.

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Learn more about UX Outloud.

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Connect with Eniola on Linkedin.

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About the panelists 🧑🏽🤝🧑🏽

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The panel was comprised of talented professionals from a variety of fields including UX research, content strategy, product management & engineering, and career coaching. Their diverse perspectives led to an insightful and informative panel session. Keep reading to get to know each of the amazing panelists: 

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Growth Content Designer: Auset Parris is a growth content designer at Meta. She has spent 7 years navigating the ever-evolving landscape of content strategy. She is passionate about the role of user research in shaping content strategies. Furthermore, Auset believes that understanding user behavior and preferences is fundamental to creating content that not only meets but exceeds user expectations. 

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Senior UX Researcher: Jasmine Williams, Ph.D. is a senior researcher with over a decade of experience conducting youth-focused research. She has deep expertise in qualitative methods, child and adolescent development, and social and emotional well-being. Jasmine is currently a user experience researcher at Meta and her work focuses on teen safety and wellbeing. 

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Product Manager: Kwame Odame has over 7 years of high-tech experience working in product management and software engineering. At Meta, Kwame is currently responsible for building the product management direction for Fan Engagement on Facebook. Kwame has also helped build Mastercard’s SaaS authentication platform, enabling cardholders to quickly confirm their identity when a suspicious transaction occurred, leveraging biometric technology. 

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UX Researcher (UXR): Fatimah Richmond is a well-rounded UX researcher with over 15 years of experience, having influenced enterprise products across leading tech giants like Google, SAP, Linkedin, and Microsoft. Fatimah has led strategy for research, programs and operations that have significantly impacted the UXR landscape, from clinician engagement strategist to reshaping Linkedin Recruiter and Jobs. As a forward thinker, she’s here to challenge our assumptions and the status quo on how research gets planned, communicated, and measured.

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Career Coach: An Xia spent the first decade of her professional life in consulting and Big Tech data science (Netflix, Meta). As a career coach, An has supported clients in gaining clarity on their career goals, navigating challenges of career growth, and making successful transitions. As a somatic coach, An has helped clients tap into the wisdom of their soma to reconnect with what truly matters to them. 

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UX Strategist: Natalie Gauvin is an experienced professional with a demonstrated history of purpose-driven work in agile software development industries and higher education. Skilled in various research methodologies. Doctor of Philosophy (Ph.D.) Candidate in Learning Design and Technology from the University of Hawaii at Manoa, focused on empathy in user experience through personas

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Level up your UXR capabilities (for free!) with the Optimal Academy 📚

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Here at Optimal we really care about helping UX researchers level up their career. This is why we’ve developed the Optimal Academy, to help you master your Optimal Workshop skills and learn more about user research and information architecture.

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Check out some of our free courses here: https://academy.optimalworkshop.com/