This was an open card sort (participants invented and named their own groups) of 39 PADI content cards, run with a panel of self-identified potential divers. Each participant sorted the same 39 cards into as many or as few groups as they wished and labelled each group.
Each row is a card; each column is a standardised category. The number is the percentage of participants who filed that card under that category. The solid cell in each row is the winning (most popular) placement.
A staircase of every one of the 741 card pairs. Cards are ordered so the most-related sit next to each other, so the natural groups appear as dark blocks running down the steps.
The hierarchical clustering tree. Cards that merge further to the left were grouped together by more participants; the six coloured branches are the groups used throughout this report.
Every card assigned to each cluster, with the cluster's internal agreement (average co-occurrence among its members).
Every card with its winning category and placement confidence, how many distinct categories it landed in (a measure of ambiguity), and its single strongest partner card.
Click any column header to sort. Cards appearing in many categories with low confidence are the ones needing attention.
The complete pairwise co-occurrence table — all 741 pairs, sortable and searchable — so every relationship in the analysis is auditable.
The cards most likely to cause hesitation in live navigation — their strongest single relationship with any other card is weak, and the agreement matrix shows their placement spread across several categories.
*Items marked with an asterisk are ambiguous in the data and should be confirmed by tree testing before launch.