Books on psychology tests are located in the BF176 section on Level 2.
The Department of Experimental Psychology has donated an historical archive of tests to the Radcliffe Science Library. They are available for reference and research only, and cannot be borrowed. Some are incomplete. The full list of tests and their contents can be found here:
This is a link to the SOLO record:
When requesting a test through SOLO, first click on the Details & Links tab to find the number of the test, then request it using the Find & Request tab.
Some other academic libraries in Britain also hold tests. Their collections can be searched using Copac, the online catalogue of national, academic and specialist libraries in Britain and Ireland.
Other resources to consult are: