Number of groups in card sorting

1. How many participants are in a card sort?
2. What is card sorter?

How many participants are in a card sort?

We recommend 15 participants for card sorting: with more, you'll get diminishing returns for each additional user; with fewer, you won't have enough data to reveal overlapping patterns in organization schemes. Analyze the data.

What is card sorter?

Card sorting is a method used to help design or evaluate the information architecture of a site. In a card sorting session, participants organize topics into categories that make sense to them and they may also help you label these groups.