Card Sorting & Tree Tests: Co-occurrence Matrix, Agreement %, Tree-Test Success and Directness
This lesson is part of the course
In this lesson
You count how often eight participants put two menu cards into the same group, turn the counts into agreement percentages, and score a tree test for success and directness.
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Lessons in this course
- Task Success: Completion Rates, an Adjusted 95 % Range with z = 1.96 and a Pass Verdict Locked
- Time on Task: Completed Attempts Only, Median vs Geometric Mean with LN & EXP, Slow Outliers Locked
- Errors & Efficiency: Errors per Tester, Shortest Path vs Clicks and a Lostness Score Locked
- Questionnaire Scores: Positive & Negative Items, Item Contributions and a 0–100 Score per Tester Locked
- Problems Found per Tester: Discovery Rate p, 1 − (1 − p)^n, Testers Needed and a Discovery Curve Locked
- Issue Prioritisation: Severity × Frequency × Task Importance, a Ranked List and Effort vs Impact Locked
- Card Sorting & Tree Tests: Co-occurrence Matrix, Agreement %, Tree-Test Success and Directness Locked
- Capstone – Target Sizes & Choices: Movement Time a + b·LOG(D/W + 1, 2), Choice Time and a Before/After Chart Locked