Despite the current need for reliable and valid test instruments in different countries in order to monitor the sign language acquisition of deaf children, very few tests are commercially available that offer strong evidence for their psychometric properties. This mirrors the current state of affairs for many sign languages, where very little…

The Modern Language Aptitude Test (Paper-and-Pencil Version, henceforth, the MLAT) measures "an individual's ability to learn a foreign language." It targets English-speaking adults (over Grade 9) who are literate. The test has only one form, which has not changed since it was first published by the Psychological Corporation in 1959. The test can…

This paper assesses the performance of a vocabulary test designed to measure second language productive vocabulary knowledge.The test, Lex30, uses a word association task to elicit vocabulary, and uses word frequency data to measure the vocabulary produced. Here we report firstly on the reliability of the test as measured by a test-retest study, a…