Lognostics - The Swansea Levels Test X_Lex is a suite of computer-delivered, self-diagnostic, language ability tests. They are designed to help learners to assess their level or progress in a foreign language, and to help teachers assess learners levels quickly and easily for placement purposes. Scores from the tests have been standardised against international language standards. The CD-ROM contains all test material, instructions on how to administer the tests, and provides information on how the tests work and what the scores mean.