Surprisingly tough to find any, much less thoughtful, information on closed card sorts (e.g. testing an existing classification system). Donna Maurer’s Card-Based Classification Evaluation comes to the rescue, complete with pictures for people like me. Bless those nice Boxes and Arrows people.

I’m tempted to make three modifications to Donna’s method: 1. Write out the notecards in pencil to allow easier taxonomy revision and retesting, 2. Use an alternate spreadsheet format that allows straightforward charting of the results, and 3. Time each response, so I can compare response time in different taxonomies to see which is better understood and used.