Vigo International Journal of Applied Linguistics VIAL
Tess Fitzspatrick and Paul Meara (1): Exploring the validity of a test of productive vocabulary VIAL. Number 1/2004: 55-74.
Lex30 is a test of productive vocabulary which uses a word association
task to elicit a lexically rich text from the learner. This text is
then evaluated according to the number of infrequent words which it
contains. Initial studies (Meara and Fitzpatrick, 2000) indicated that
Lex30 scores might correlate with general L2 proficiency. This paper
explores the reliability and validity of the test through a test-retest
study and two concurrent validity measures, one using native speaker
data and one using a set of collateral tests. These demonstrate that
Lex30 produces reliable results and operates with a degree of validity.
The results of these studies lead to suggestions as to how the Lex30
test might be improved to further increase its robustness. Lastly, we
discuss ways in which the Lex30 studies have shed light on the
construct of productive vocabulary and the complex nature of vocabulary
(1) University of Wales, Swansea, U.K.
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