// description
Card sorting is a research method in which participants organise topics into categories that make sense to them. In an open card sort, participants create and name their own categories. In a closed card sort, categories are predetermined and participants place items into them. The method reveals users' mental models, which often differ substantially from how a creator or company organises things internally.
// history
Card sorting has roots in psychology (George Kelly's personal construct theory, 1955) and knowledge engineering. It entered the UX field in the 1990s as web-based information architecture became a recognised discipline. Donna Spencer's 2009 book Card Sorting: Designing Usable Categories is a key reference. Online tools such as OptimalSort and UserZoom have made remote card sorting practical at scale.
// example
An online course creator with 40 lessons wants to reorganise her course navigation. Internally, she organised content by medium: "video lessons," "worksheets," "templates." A card sort with 15 students reveals they organise the same content by stage in their journey: "getting started," "building my first product," "growing my shop," "going full-time." She restructures the course around those user-defined stages, and completion rates increase because students can now find what they need based on where they are, not based on format.
// katharyne's take
Card sorting is one of the most useful (and most overlooked) research methods for course creators. If your students can't navigate your course intuitively, they'll stop engaging with it — not because the content isn't good but because the organisation doesn't match how they think. Before you finalise any course structure, run a quick card sort with five students: write each lesson title on a sticky note and ask them to group them into categories they'd find natural. The categories they create are your navigation. This also works brilliantly for organising Etsy shops and digital product bundles.
// creative uses
- Run a digital card sort on your Etsy shop sections using OptimalSort (free for up to 10 participants): write each of your product titles on a card and ask 10 buyers or potential customers to sort them into groups that make sense to them. The categories they create are your ideal shop navigation — organized by buyer intent, not by your production categories.
- Use card sorting to structure a new digital product bundle: list every asset you plan to include, send the list to five potential buyers via a Google Form and ask them to group the items by "when I'd use this." The clusters reveal which items belong together and what the bundle's sections should be called.
- Apply a card sort to your newsletter content before launching a new series: list 20 potential email topics, ask your subscribers to group them into the themes they'd most want to read in sequence. The clusters become your series structure and the category names become your subject line strategy.
// quick actions
- If you have a course with more than 15 lessons, do a paper card sort today: write each lesson title on a Post-it note (or index card), then ask one student to group them into categories that feel natural to them. If their categories don't match your current module structure, you have a navigation problem worth fixing before your next cohort.
- For your Etsy shop, list all your current section names on paper and ask someone who has never visited your shop to predict what products they'd find in each section. Any section whose name confuses a fresh eye is either misnamed or misorganised — both fixable in Etsy Shop Manager in under 30 minutes.
- Use OptimalSort.com to run a free remote card sort with 10 participants before your next course curriculum finalization. The tool automatically generates a dendrogram (similarity map) showing which lessons participants consistently grouped together — your ideal module structure, visualised without manual analysis.
// prompt ideas
Simulate a card sort for my course structure. Here are my [X] lesson titles: [paste them]. Group them into categories the way a student who has never taken the course would naturally organise them — by stage in their journey, not by topic or format. Name the categories using language a student would use, not the language I'd use as the creator.
Here are the sections in my Etsy shop: [list them]. And here are my products: [list them]. Act as a first-time visitor to my shop who has never heard of me. Which products would you expect to find in which sections? Point out any mismatches between my section names and what a buyer would expect to find there.
Help me design a card sorting exercise I can run with five potential customers before I launch my next digital product bundle. The bundle includes: [list the assets]. Write the instructions I'd send participants, the question I'd ask them to answer by grouping the items, and three follow-up questions to ask after they've sorted everything.