Guides
Test library
What each kind of test measures, and how it is scored
One page per kind of assessment, written for the person deciding whether to use one rather than for the person sitting it. Each carries worked sample items with the weight on every option and the reason it earns that weight — the part of a scoring key that is normally invisible from outside.
Looking for the tests themselves?
These pages explain how a method works. The catalogue lists the forms you can actually run, with lengths, levels and what each one reports.