Strella docs
GuidesDeveloper
Strella docs
GuidesDeveloper
Welcome to StrellaChangelog
Run your first studyHow AI helps you in StrellaGlossary
The Build screenStart with the study setup chatSet up your study detailsWrite research objectivesBuild your screenerBuild your question guideBest practicesAdd survey questions to your interviewAdd a stimulus to your interviewHost a prototype and add it to your interviewAdd a card sortAdd a tree testRandomize sections (A/B variants)Conditional sectionsVersion historyUse the build assistantPreview your interviewUpload an existing discussion guideImport from another study
How the AI moderator worksVoice, language & behaviorRecording modesCustom dictionary & pronunciationCustomize the participant experienceWhat the AI moderator can't do
How recruitment worksSchedule moderated interviewsHire from a participant panelBring your own participantsManage share links & redirectsPass data with URL parametersControl access & schedulingSet quotasApprove, reject & invitePay participants you recruitedReport a participantWatch the funnel
Publish your studyEdit a study after launch
Get oriented in ResultsBring in interviews you ran elsewhereReview a single interviewBrowse analysisCode responsesSee how participants complete on-screen tasksSee how participants sorted your cardsSee how participants use your Figma prototypeUse Strella's AI chatAI chat best practices
Build & share a reportCreate & share a highlight reel
Teammates, organizations & workspacesDelete projectsProject defaultsBilling & creditsConnect FigmaAPI, MCP & AI assistantsParticipant data accessMedia links and who can open themActivity logs
Step typesScreener question typesRecording settingsParticipant statuses & funnel stagesSupported languagesVoice optionsBrowser & device requirements
MCP serverConnect an AI clientTools & skills referenceUse cases & example promptsWhat's newSecurity & privacyFAQ & troubleshooting
Analyze your interviewsSee how participants sorted your cards
Analyze your interviews

See how participants sorted your cards

For card sort questions, Strella combines every sort into one card-by-group table, and keeps each individual sort on the participant who made it.

When participants complete a card sort, each of them drags your cards into groups and names those groups. In Results, on the card sort question, Strella shows the combined picture at the top, as one card with an Overall sort tab and a Similarity matrix tab, and each individual sort below, on the participant who made it.

The Overall sort table

The Overall sort table combines every participant's sort. Cards run down the left side, and every group name participants used runs across the top, both in alphabetical order. Each cell shows how many participants placed that card in that group, and the cell's shading deepens as more participants agree, so the strongest patterns stand out at a glance.

  • Groups with the same name are combined, even when participants typed them with different capitalization or extra spaces. The table shows the name the way the first participant wrote it.
  • View as switches every cell between Percentage (the share of participants who answered the question) and Count (the number of participants).
  • Select a group's column header to order the cards by that group, most-placed first. Select it again to flip the order, and a third time to return to alphabetical.
  • The group filter above the table narrows the view to the groups you choose. Cards that were never placed in a chosen group drop out of the table until you clear the filter.
  • Long card and group names are shortened to fit; hover over one to see the full name.

The Similarity matrix

The Similarity matrix tab shows how often participants placed each pair of cards in the same group, whatever they named it. Cards run along the diagonal, and the cell where two cards meet shows the percentage of participants who grouped them together. The deeper the shading, the stronger the agreement. Hover over a cell to see both card names and the underlying numbers, like "10 of 12".

  • Strella places cards that participants often group together next to each other, so blocks of dark cells along the diagonal show the natural clusters in your participants' mental model.
  • A 0% cell is a finding too: no participant ever put those two cards together.
  • A blank cell means the pair can't be measured: no single participant sorted both cards, which can happen if you changed the card list while the study was running.
  • Percentages compare each pair against the participants who sorted both of its cards, so results stay accurate even when the card list changed mid-study.

Each participant's sort

Every participant's own sort appears in their entry in the Participants list at the bottom of the page. Expand a participant to see each group they made and the cards they placed in it. If they spoke during the sort, their transcript for the question appears alongside.

The AI summary reads the sort itself

Participants answer card sorts by dragging, not speaking, so Strella's AI writes the question's summary from the submitted sorts rather than from a transcript. The summary reads like a researcher's findings. It covers:

  • The summary describes where cards landed, never why a participant placed one; nothing was spoken, so motivations are not guessed at.
  • Judgments about where a card belongs come from which cards it was grouped with, so a stable cluster still appears even when every participant named their groups differently.
  • Sentiment and themes stay off for card sorts, and questions answered with a file upload have no summary at all; the sort table remains the detailed analysis.

Tips

  • Sort by your most important group first to see which cards participants most agree belong there.
  • Disagreement is a finding: a card spread thinly across many groups is one participants could not place confidently.
  • If the table has near-duplicate groups (like "Pricing" and "Price stuff"), participants named the same idea differently. Read those groups together.

Related

Browse your analysis

The question-by-question view where card sort results live.

Review a single interview

Per-interview transcript and recording for any participant.

See how participants complete on-screen tasks

For tasks on a live website or app, Strella watches the screen recording to grade pass/fail and map the screens each participant moved through.

See how participants use your Figma prototype

Read the click heatmap, paths, and screen metrics Strella captures when a participant moves through a Figma prototype during an interview.

On this page

The Overall sort tableThe Similarity matrixEach participant's sortThe AI summary reads the sort itselfTipsRelated